Reduce string objects by using \ instead of + or << for concatenating strings

(I personally prefer writing one string in one line no matter how long it is, though)

31 files changed, 567 insertions, 567 deletions

diff --git a/actioncable/lib/action_cable/connection/client_socket.rb b/actioncable/lib/action_cable/connection/client_socket.rb
index 70a2bbecb1..c7e30e78c8 100644
--- a/actioncable/lib/action_cable/connection/client_socket.rb
+++ b/actioncable/lib/action_cable/connection/client_socket.rb
@@ -90,8 +90,8 @@ module ActionCable
         reason ||= ""
 
         unless code == 1000 || (code >= 3000 && code <= 4999)
-          raise ArgumentError, "Failed to execute 'close' on WebSocket: " +
-                               "The code must be either 1000, or between 3000 and 4999. " +
+          raise ArgumentError, "Failed to execute 'close' on WebSocket: " \
+                               "The code must be either 1000, or between 3000 and 4999. " \
                                "#{code} is neither."
         end
 
diff --git a/actionmailer/lib/action_mailer/test_case.rb b/actionmailer/lib/action_mailer/test_case.rb
index cbd841466d..9ead03a40c 100644
--- a/actionmailer/lib/action_mailer/test_case.rb
+++ b/actionmailer/lib/action_mailer/test_case.rb
@@ -4,8 +4,8 @@ require "rails-dom-testing"
 module ActionMailer
   class NonInferrableMailerError < ::StandardError
     def initialize(name)
-      super "Unable to determine the mailer to test from #{name}. " +
-        "You'll need to specify it using tests YourMailer in your " +
+      super "Unable to determine the mailer to test from #{name}. " \
+        "You'll need to specify it using tests YourMailer in your " \
         "test case definition"
     end
   end
diff --git a/actionmailer/test/mail_helper_test.rb b/actionmailer/test/mail_helper_test.rb
index a2e04b5f48..6042548aef 100644
--- a/actionmailer/test/mail_helper_test.rb
+++ b/actionmailer/test/mail_helper_test.rb
@@ -2,11 +2,11 @@ require "abstract_unit"
 
 class HelperMailer < ActionMailer::Base
   def use_mail_helper
-    @text = "But soft! What light through yonder window breaks? It is the east, " +
-            "and Juliet is the sun. Arise, fair sun, and kill the envious moon, " +
-            "which is sick and pale with grief that thou, her maid, art far more " +
-            "fair than she. Be not her maid, for she is envious! Her vestal " +
-            "livery is but sick and green, and none but fools do wear it. Cast " +
+    @text = "But soft! What light through yonder window breaks? It is the east, " \
+            "and Juliet is the sun. Arise, fair sun, and kill the envious moon, " \
+            "which is sick and pale with grief that thou, her maid, art far more " \
+            "fair than she. Be not her maid, for she is envious! Her vestal " \
+            "livery is but sick and green, and none but fools do wear it. Cast " \
             "it off!"
 
     mail_with_defaults do |format|
diff --git a/actionpack/lib/action_dispatch/middleware/cookies.rb b/actionpack/lib/action_dispatch/middleware/cookies.rb
index 956c53e813..c61cb3fd68 100644
--- a/actionpack/lib/action_dispatch/middleware/cookies.rb
+++ b/actionpack/lib/action_dispatch/middleware/cookies.rb
@@ -572,7 +572,7 @@ module ActionDispatch
         super
 
         if ActiveSupport::LegacyKeyGenerator === key_generator
-          raise "You didn't set secrets.secret_key_base, which is required for this cookie jar. " +
+          raise "You didn't set secrets.secret_key_base, which is required for this cookie jar. " \
             "Read the upgrade documentation to learn more about this new config option."
         end
 
diff --git a/actionpack/lib/action_dispatch/middleware/remote_ip.rb b/actionpack/lib/action_dispatch/middleware/remote_ip.rb
index 9f1ae80b97..8bae5bfeff 100644
--- a/actionpack/lib/action_dispatch/middleware/remote_ip.rb
+++ b/actionpack/lib/action_dispatch/middleware/remote_ip.rb
@@ -131,8 +131,8 @@ module ActionDispatch
         should_check_ip = @check_ip && client_ips.last && forwarded_ips.last
         if should_check_ip && !forwarded_ips.include?(client_ips.last)
           # We don't know which came from the proxy, and which from the user
-          raise IpSpoofAttackError, "IP spoofing attack?! " +
-            "HTTP_CLIENT_IP=#{@req.client_ip.inspect} " +
+          raise IpSpoofAttackError, "IP spoofing attack?! " \
+            "HTTP_CLIENT_IP=#{@req.client_ip.inspect} " \
             "HTTP_X_FORWARDED_FOR=#{@req.x_forwarded_for.inspect}"
         end
 
diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index 97c937b0b1..d9f018c8ac 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -8,8 +8,8 @@ module ActionDispatch
   module Session
     class SessionRestoreError < StandardError #:nodoc:
       def initialize
-        super("Session contains objects whose class definition isn't available.\n" +
-          "Remember to require the classes for all objects kept in the session.\n" +
+        super("Session contains objects whose class definition isn't available.\n" \
+          "Remember to require the classes for all objects kept in the session.\n" \
           "(Original exception: #{$!.message} [#{$!.class}])\n")
         set_backtrace $!.backtrace
       end
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index 021ffec862..15f816a0ae 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -145,8 +145,8 @@ module ActionDispatch
 
         self.host        = DEFAULT_HOST
         self.remote_addr = "127.0.0.1"
-        self.accept      = "text/xml,application/xml,application/xhtml+xml," +
-                           "text/html;q=0.9,text/plain;q=0.8,image/png," +
+        self.accept      = "text/xml,application/xml,application/xhtml+xml," \
+                           "text/html;q=0.9,text/plain;q=0.8,image/png," \
                            "*/*;q=0.5"
 
         unless defined? @named_routes_configured
diff --git a/actionpack/test/controller/filters_test.rb b/actionpack/test/controller/filters_test.rb
index f9701585a9..90b3f7ea88 100644
--- a/actionpack/test/controller/filters_test.rb
+++ b/actionpack/test/controller/filters_test.rb
@@ -704,7 +704,7 @@ class FilterTest < ActionController::TestCase
 
   def test_prepending_and_appending_around_action
     test_process(MixedFilterController)
-    assert_equal " before aroundfilter  before procfilter  before appended aroundfilter " +
+    assert_equal " before aroundfilter  before procfilter  before appended aroundfilter " \
                  " after appended aroundfilter  after procfilter  after aroundfilter ",
                  MixedFilterController.execution_log
   end
diff --git a/actionpack/test/dispatch/session/cookie_store_test.rb b/actionpack/test/dispatch/session/cookie_store_test.rb
index 2a1053be16..63dfc07c0d 100644
--- a/actionpack/test/dispatch/session/cookie_store_test.rb
+++ b/actionpack/test/dispatch/session/cookie_store_test.rb
@@ -175,7 +175,7 @@ class CookieStoreTest < ActionDispatch::IntegrationTest
 
   def test_doesnt_write_session_cookie_if_session_is_unchanged
     with_test_route_set do
-      cookies[SessionKey] = "BAh7BjoIZm9vIghiYXI%3D--" +
+      cookies[SessionKey] = "BAh7BjoIZm9vIghiYXI%3D--" \
         "fef868465920f415f2c0652d6910d3af288a0367"
       get "/no_session_access"
       assert_response :success
diff --git a/actionview/lib/action_view/helpers/url_helper.rb b/actionview/lib/action_view/helpers/url_helper.rb
index 1f753bccd6..a306903c60 100644
--- a/actionview/lib/action_view/helpers/url_helper.rb
+++ b/actionview/lib/action_view/helpers/url_helper.rb
@@ -35,7 +35,7 @@ module ActionView
         when :back
           _back_url
         else
-          raise ArgumentError, "arguments passed to url_for can't be handled. Please require " +
+          raise ArgumentError, "arguments passed to url_for can't be handled. Please require " \
                                "routes or provide your own implementation"
         end
       end
diff --git a/actionview/lib/action_view/renderer/partial_renderer.rb b/actionview/lib/action_view/renderer/partial_renderer.rb
index b8a79da97f..af3df52b28 100644
--- a/actionview/lib/action_view/renderer/partial_renderer.rb
+++ b/actionview/lib/action_view/renderer/partial_renderer.rb
@@ -532,11 +532,11 @@ module ActionView
         [variable, variable_counter, variable_iteration]
       end
 
-      IDENTIFIER_ERROR_MESSAGE = "The partial name (%s) is not a valid Ruby identifier; " +
+      IDENTIFIER_ERROR_MESSAGE = "The partial name (%s) is not a valid Ruby identifier; " \
                                  "make sure your partial name starts with underscore."
 
-      OPTION_AS_ERROR_MESSAGE  = "The value (%s) of the option `as` is not a valid Ruby identifier; " +
-                                 "make sure it starts with lowercase letter, " +
+      OPTION_AS_ERROR_MESSAGE  = "The value (%s) of the option `as` is not a valid Ruby identifier; " \
+                                 "make sure it starts with lowercase letter, " \
                                  "and is followed by any combination of letters, numbers and underscores."
 
       def raise_invalid_identifier(path)
diff --git a/actionview/lib/action_view/template/handlers/builder.rb b/actionview/lib/action_view/template/handlers/builder.rb
index 494b543152..e99b921cb7 100644
--- a/actionview/lib/action_view/template/handlers/builder.rb
+++ b/actionview/lib/action_view/template/handlers/builder.rb
@@ -7,7 +7,7 @@ module ActionView
 
       def call(template)
         require_engine
-        "xml = ::Builder::XmlMarkup.new(:indent => 2);" +
+        "xml = ::Builder::XmlMarkup.new(:indent => 2);" \
           "self.output_buffer = xml.target!;" +
           template.source +
           ";xml.target!;"
diff --git a/actionview/test/activerecord/form_helper_activerecord_test.rb b/actionview/test/activerecord/form_helper_activerecord_test.rb
index 0f7960b408..3b314588c7 100644
--- a/actionview/test/activerecord/form_helper_activerecord_test.rb
+++ b/actionview/test/activerecord/form_helper_activerecord_test.rb
@@ -45,7 +45,7 @@ class FormHelperActiveRecordTest < ActionView::TestCase
     end
 
     expected = whole_form("/developers/123", "edit_developer_123", "edit_developer", method: "patch") do
-      '<input id="developer_projects_attributes_abc_name" name="developer[projects_attributes][abc][name]" type="text" value="project #321" />' +
+      '<input id="developer_projects_attributes_abc_name" name="developer[projects_attributes][abc][name]" type="text" value="project #321" />' \
           '<input id="developer_projects_attributes_abc_id" name="developer[projects_attributes][abc][id]" type="hidden" value="321" />'
     end
 
diff --git a/actionview/test/template/form_helper/form_with_test.rb b/actionview/test/template/form_helper/form_with_test.rb
index 3a91c7dce7..a4a2966ff9 100644
--- a/actionview/test/template/form_helper/form_with_test.rb
+++ b/actionview/test/template/form_helper/form_with_test.rb
@@ -310,13 +310,13 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", "create-post", method: "patch") do
-      "<label for='post_title'>The Title</label>" +
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
-      "<input name='post[secret]' checked='checked' type='checkbox' value='1' />" +
-      "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />" +
-      "<button name='button' type='submit'>Create post</button>" +
+      "<label for='post_title'>The Title</label>" \
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
+      "<input name='post[secret]' checked='checked' type='checkbox' value='1' />" \
+      "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />" \
+      "<button name='button' type='submit'>Create post</button>" \
       "<button name='button' type='submit'><span>Create post</span></button>"
     end
 
@@ -330,7 +330,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      '<label for="title">Label me</label>' +
+      '<label for="title">Label me</label>' \
       '<input type="text" name="title">'
     end
 
@@ -344,7 +344,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123") do
-      '<label for="title">Label me</label>' +
+      '<label for="title">Label me</label>' \
       '<input type="text" name="title">'
     end
 
@@ -400,10 +400,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<input name='post[active]' type='radio' value='true' />" +
-      "<label for='post_active_true'>true</label>" +
-      "<input checked='checked' name='post[active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<input name='post[active]' type='radio' value='true' />" \
+      "<label for='post_active_true'>true</label>" \
+      "<input checked='checked' name='post[active]' type='radio' value='false' />" \
       "<label for='post_active_false'>false</label>"
     end
 
@@ -422,12 +422,12 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<label for='post_active_true'>" +
-      "<input name='post[active]' type='radio' value='true' />" +
-      "true</label>" +
-      "<label for='post_active_false'>" +
-      "<input checked='checked' name='post[active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<label for='post_active_true'>" \
+      "<input name='post[active]' type='radio' value='true' />" \
+      "true</label>" \
+      "<label for='post_active_false'>" \
+      "<input checked='checked' name='post[active]' type='radio' value='false' />" \
       "false</label>"
     end
 
@@ -448,13 +448,13 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<label for='post_active_true'>" +
-      "<input name='post[active]' type='radio' value='true' />" +
-      "true</label>" +
-      "<label for='post_active_false'>" +
-      "<input checked='checked' name='post[active]' type='radio' value='false' />" +
-      "false</label>" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<label for='post_active_true'>" \
+      "<input name='post[active]' type='radio' value='true' />" \
+      "true</label>" \
+      "<label for='post_active_false'>" \
+      "<input checked='checked' name='post[active]' type='radio' value='false' />" \
+      "false</label>" \
       "<input name='post[id]' type='hidden' value='1' />"
     end
 
@@ -470,10 +470,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input type='hidden' name='post[1][active]' value='' />" +
-      "<input name='post[1][active]' type='radio' value='true' />" +
-      "<label for='post_1_active_true'>true</label>" +
-      "<input checked='checked' name='post[1][active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[1][active]' value='' />" \
+      "<input name='post[1][active]' type='radio' value='true' />" \
+      "<label for='post_1_active_true'>true</label>" \
+      "<input checked='checked' name='post[1][active]' type='radio' value='false' />" \
       "<label for='post_1_active_false'>false</label>"
     end
 
@@ -489,12 +489,12 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='1' />" +
-      "<label for='post_tag_ids_1'>Tag 1</label>" +
-      "<input name='post[tag_ids][]' type='checkbox' value='2' />" +
-      "<label for='post_tag_ids_2'>Tag 2</label>" +
-      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='3' />" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='1' />" \
+      "<label for='post_tag_ids_1'>Tag 1</label>" \
+      "<input name='post[tag_ids][]' type='checkbox' value='2' />" \
+      "<label for='post_tag_ids_2'>Tag 2</label>" \
+      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='3' />" \
       "<label for='post_tag_ids_3'>Tag 3</label>"
     end
 
@@ -513,15 +513,15 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<label for='post_tag_ids_1'>" +
-      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='1' />" +
-      "Tag 1</label>" +
-      "<label for='post_tag_ids_2'>" +
-      "<input name='post[tag_ids][]' type='checkbox' value='2' />" +
-      "Tag 2</label>" +
-      "<label for='post_tag_ids_3'>" +
-      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='3' />" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<label for='post_tag_ids_1'>" \
+      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='1' />" \
+      "Tag 1</label>" \
+      "<label for='post_tag_ids_2'>" \
+      "<input name='post[tag_ids][]' type='checkbox' value='2' />" \
+      "Tag 2</label>" \
+      "<label for='post_tag_ids_3'>" \
+      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='3' />" \
       "Tag 3</label>"
     end
 
@@ -543,16 +543,16 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<label for='post_tag_ids_1'>" +
-      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='1' />" +
-      "Tag 1</label>" +
-      "<label for='post_tag_ids_2'>" +
-      "<input name='post[tag_ids][]' type='checkbox' value='2' />" +
-      "Tag 2</label>" +
-      "<label for='post_tag_ids_3'>" +
-      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='3' />" +
-      "Tag 3</label>" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<label for='post_tag_ids_1'>" \
+      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='1' />" \
+      "Tag 1</label>" \
+      "<label for='post_tag_ids_2'>" \
+      "<input name='post[tag_ids][]' type='checkbox' value='2' />" \
+      "Tag 2</label>" \
+      "<label for='post_tag_ids_3'>" \
+      "<input checked='checked' name='post[tag_ids][]' type='checkbox' value='3' />" \
+      "Tag 3</label>" \
       "<input name='post[id]' type='hidden' value='1' />"
     end
 
@@ -569,8 +569,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts") do
-      "<input name='post[1][tag_ids][]' type='hidden' value='' />" +
-      "<input checked='checked' name='post[1][tag_ids][]' type='checkbox' value='1' />" +
+      "<input name='post[1][tag_ids][]' type='hidden' value='' />" \
+      "<input checked='checked' name='post[1][tag_ids][]' type='checkbox' value='1' />" \
       "<label for='post_1_tag_ids_1'>Tag 1</label>"
     end
 
@@ -636,7 +636,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/44", method: "patch") do
-      "<input name='post[title]' type='text' value='And his name will be forty and four.' />" +
+      "<input name='post[title]' type='text' value='And his name will be forty and four.' />" \
       "<input name='commit' data-disable-with='Edit post' type='submit' value='Edit post' />"
     end
 
@@ -653,11 +653,11 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", "create-post", method: "patch") do
-      "<label for='other_name_title' class='post_title'>Title</label>" +
-      "<input name='other_name[title]' value='Hello World' type='text' />" +
-      "<textarea name='other_name[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='other_name[secret]' value='0' type='hidden' />" +
-      "<input name='other_name[secret]' checked='checked' value='1' type='checkbox' />" +
+      "<label for='other_name_title' class='post_title'>Title</label>" \
+      "<input name='other_name[title]' value='Hello World' type='text' />" \
+      "<textarea name='other_name[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='other_name[secret]' value='0' type='hidden' />" \
+      "<input name='other_name[secret]' checked='checked' value='1' type='checkbox' />" \
       "<input name='commit' value='Create post' data-disable-with='Create post' type='submit' />"
     end
 
@@ -672,9 +672,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/", "create-post", method: "delete") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -689,9 +689,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/", "create-post", method: "delete") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -720,9 +720,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/", "create-post", method: "patch") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -761,9 +761,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/", "create-post") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -779,10 +779,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<label for='post_123_title'>Title</label>" +
-      "<input name='post[123][title]' type='text' value='Hello World' />" +
-      "<textarea name='post[123][body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[123][secret]' type='hidden' value='0' />" +
+      "<label for='post_123_title'>Title</label>" \
+      "<input name='post[123][title]' type='text' value='Hello World' />" \
+      "<textarea name='post[123][body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[123][secret]' type='hidden' value='0' />" \
       "<input name='post[123][secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -797,9 +797,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<input name='post[][title]' type='text' value='Hello World' />" +
-      "<textarea name='post[][body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[][secret]' type='hidden' value='0' />" +
+      "<input name='post[][title]' type='text' value='Hello World' />" \
+      "<textarea name='post[][body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[][secret]' type='hidden' value='0' />" \
       "<input name='post[][secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -814,8 +814,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" +
-      "<div class='field_with_errors'><input name='post[author_name]' type='text' value='' /></div>" +
+      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" \
+      "<div class='field_with_errors'><input name='post[author_name]' type='text' value='' /></div>" \
       "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />"
     end
 
@@ -832,8 +832,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" +
-      "<div class='field_with_errors'><input name='post[author_name]' type='text' value='' /></div>" +
+      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" \
+      "<div class='field_with_errors'><input name='post[author_name]' type='text' value='' /></div>" \
       "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />"
     end
 
@@ -847,7 +847,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<div class='field_with_errors'><label for='post_author_name' class='label'>Name</label></div>" +
+      "<div class='field_with_errors'><label for='post_author_name' class='label'>Name</label></div>" \
       "<div class='field_with_errors'><label for='post_author_name' class='label'>Name</label></div>"
     end
 
@@ -863,9 +863,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", "namespace_edit_post_123", "edit_post", method: "patch") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -1009,7 +1009,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<input name='post[123][title]' type='text' value='Hello World' />" +
+      "<input name='post[123][title]' type='text' value='Hello World' />" \
       "<input name='post[123][comment][][name]' type='text' value='new comment' />"
     end
 
@@ -1025,7 +1025,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<input name='post[1][title]' type='text' value='Hello World' />" +
+      "<input name='post[1][title]' type='text' value='Hello World' />" \
       "<input name='post[1][comment][1][name]' type='text' value='new comment' />"
     end
 
@@ -1135,7 +1135,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
         '<input name="post[author_attributes][name]" type="text" value="new author" />'
     end
 
@@ -1162,8 +1162,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][name]" type="text" value="author #321" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][name]" type="text" value="author #321" />' \
       '<input name="post[author_attributes][id]" type="hidden" value="321" />'
     end
 
@@ -1181,8 +1181,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][name]" type="text" value="author #321" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][name]" type="text" value="author #321" />' \
       '<input name="post[author_attributes][id]" type="hidden" value="321" />'
     end
 
@@ -1200,7 +1200,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
       '<input name="post[author_attributes][name]" type="text" value="author #321" />'
     end
 
@@ -1218,7 +1218,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
       '<input name="post[author_attributes][name]" type="text" value="author #321" />'
     end
 
@@ -1236,8 +1236,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][name]" type="text" value="author #321" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][name]" type="text" value="author #321" />' \
       '<input name="post[author_attributes][id]" type="hidden" value="321" />'
     end
 
@@ -1256,8 +1256,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][id]" type="hidden" value="321" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][id]" type="hidden" value="321" />' \
       '<input name="post[author_attributes][name]" type="text" value="author #321" />'
     end
 
@@ -1277,10 +1277,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -1304,10 +1304,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][name]" type="text" value="author #321" />' +
-      '<input name="post[author_attributes][id]" type="hidden" value="321" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][name]" type="text" value="author #321" />' \
+      '<input name="post[author_attributes][id]" type="hidden" value="321" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -1331,9 +1331,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][name]" type="text" value="author #321" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][name]" type="text" value="author #321" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -1357,10 +1357,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[author_attributes][name]" type="text" value="author #321" />' +
-      '<input name="post[author_attributes][id]" type="hidden" value="321" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[author_attributes][name]" type="text" value="author #321" />' \
+      '<input name="post[author_attributes][id]" type="hidden" value="321" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -1380,10 +1380,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -1404,10 +1404,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -1427,8 +1427,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="new comment" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="new comment" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="new comment" />'
     end
 
@@ -1448,9 +1448,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #321" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="321" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #321" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="321" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="new comment" />'
     end
 
@@ -1483,10 +1483,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -1504,10 +1504,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -1539,10 +1539,10 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -1562,9 +1562,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[title]" type="text" value="Hello World" />' +
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #321" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="321" />' +
+      '<input name="post[title]" type="text" value="Hello World" />' \
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #321" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="321" />' \
       '<input name="post[comments_attributes][1][name]" type="text" value="new comment" />'
     end
 
@@ -1582,7 +1582,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' +
+      '<input name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' \
       '<input name="post[comments_attributes][abc][id]" type="hidden" value="321" />'
     end
 
@@ -1599,7 +1599,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' +
+      '<input name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' \
       '<input name="post[comments_attributes][abc][id]" type="hidden" value="321" />'
     end
 
@@ -1622,7 +1622,7 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' +
+      '<input name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' \
       '<input name="post[comments_attributes][abc][id]" type="hidden" value="321" />'
     end
 
@@ -1708,17 +1708,17 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      '<input name="post[comments_attributes][0][name]" type="text" value="comment #321" />' +
-      '<input name="post[comments_attributes][0][relevances_attributes][0][value]" type="text" value="commentrelevance #314" />' +
-      '<input name="post[comments_attributes][0][relevances_attributes][0][id]" type="hidden" value="314" />' +
-      '<input name="post[comments_attributes][0][id]" type="hidden" value="321" />' +
-      '<input name="post[tags_attributes][0][value]" type="text" value="tag #123" />' +
-      '<input name="post[tags_attributes][0][relevances_attributes][0][value]" type="text" value="tagrelevance #3141" />' +
-      '<input name="post[tags_attributes][0][relevances_attributes][0][id]" type="hidden" value="3141" />' +
-      '<input name="post[tags_attributes][0][id]" type="hidden" value="123" />' +
-      '<input name="post[tags_attributes][1][value]" type="text" value="tag #456" />' +
-      '<input name="post[tags_attributes][1][relevances_attributes][0][value]" type="text" value="tagrelevance #31415" />' +
-      '<input name="post[tags_attributes][1][relevances_attributes][0][id]" type="hidden" value="31415" />' +
+      '<input name="post[comments_attributes][0][name]" type="text" value="comment #321" />' \
+      '<input name="post[comments_attributes][0][relevances_attributes][0][value]" type="text" value="commentrelevance #314" />' \
+      '<input name="post[comments_attributes][0][relevances_attributes][0][id]" type="hidden" value="314" />' \
+      '<input name="post[comments_attributes][0][id]" type="hidden" value="321" />' \
+      '<input name="post[tags_attributes][0][value]" type="text" value="tag #123" />' \
+      '<input name="post[tags_attributes][0][relevances_attributes][0][value]" type="text" value="tagrelevance #3141" />' \
+      '<input name="post[tags_attributes][0][relevances_attributes][0][id]" type="hidden" value="3141" />' \
+      '<input name="post[tags_attributes][0][id]" type="hidden" value="123" />' \
+      '<input name="post[tags_attributes][1][value]" type="text" value="tag #456" />' \
+      '<input name="post[tags_attributes][1][relevances_attributes][0][value]" type="text" value="tagrelevance #31415" />' \
+      '<input name="post[tags_attributes][1][relevances_attributes][0][id]" type="hidden" value="31415" />' \
       '<input name="post[tags_attributes][1][id]" type="hidden" value="456" />'
     end
 
@@ -1749,9 +1749,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -1765,9 +1765,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<input name='post[123][title]' type='text' value='Hello World' />" +
-      "<textarea name='post[123][body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[123][secret]' type='hidden' value='0' />" +
+      "<input name='post[123][title]' type='text' value='Hello World' />" \
+      "<textarea name='post[123][body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[123][secret]' type='hidden' value='0' />" \
       "<input name='post[123][secret]' checked='checked' type='checkbox' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -1781,9 +1781,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<input name='post[][title]' type='text' value='Hello World' />" +
-      "<textarea name='post[][body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[][secret]' type='hidden' value='0' />" +
+      "<input name='post[][title]' type='text' value='Hello World' />" \
+      "<textarea name='post[][body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[][secret]' type='hidden' value='0' />" \
       "<input name='post[][secret]' checked='checked' type='checkbox' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -1797,9 +1797,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<input name='post[abc][title]' type='text' value='Hello World' />" +
-      "<textarea name='post[abc][body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[abc][secret]' type='hidden' value='0' />" +
+      "<input name='post[abc][title]' type='text' value='Hello World' />" \
+      "<textarea name='post[abc][body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[abc][secret]' type='hidden' value='0' />" \
       "<input name='post[abc][secret]' checked='checked' type='checkbox' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -1813,9 +1813,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -1829,9 +1829,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -1843,7 +1843,7 @@ class FormWithActsLikeFormForTest < FormWithTest
       concat f.text_field(:title)
     end
 
-    assert_dom_equal "<label for=\"author_post_title\">Title</label>" +
+    assert_dom_equal "<label for=\"author_post_title\">Title</label>" \
     "<input name='author[post][title]' type='text' value='Hello World' />",
       output_buffer
   end
@@ -1854,7 +1854,7 @@ class FormWithActsLikeFormForTest < FormWithTest
       concat f.text_field(:title)
     end
 
-    assert_dom_equal "<label for=\"author_post_1_title\">Title</label>" +
+    assert_dom_equal "<label for=\"author_post_1_title\">Title</label>" \
       "<input name='author[post][1][title]' type='text' value='Hello World' />",
       output_buffer
   end
@@ -1874,9 +1874,9 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", "create-post", method: "patch") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='parent_post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='parent_post[secret]' type='hidden' value='0' />" \
       "<input name='parent_post[secret]' checked='checked' type='checkbox' value='1' />"
     end
 
@@ -1894,8 +1894,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", "create-post", method: "patch") do
-      "<input name='post[title]' type='text' value='Hello World' />" +
-      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" +
+      "<input name='post[title]' type='text' value='Hello World' />" \
+      "<textarea name='post[body]'>\nBack to the hill and over it again!</textarea>" \
       "<input name='post[comment][name]' type='text' value='new comment' />"
     end
 
@@ -1934,8 +1934,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<label for='title'>Title:</label> <input name='post[title]' type='text' value='Hello World' /><br/>" +
-      "<label for='body'>Body:</label> <textarea name='post[body]'>\nBack to the hill and over it again!</textarea><br/>" +
+      "<label for='title'>Title:</label> <input name='post[title]' type='text' value='Hello World' /><br/>" \
+      "<label for='body'>Body:</label> <textarea name='post[body]'>\nBack to the hill and over it again!</textarea><br/>" \
       "<label for='secret'>Secret:</label> <input name='post[secret]' type='hidden' value='0' /><input name='post[secret]' checked='checked' type='checkbox' value='1' /><br/>"
     end
 
@@ -1953,8 +1953,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected = whole_form("/posts/123", method: "patch") do
-      "<label for='title'>Title:</label> <input name='post[title]' type='text' value='Hello World' /><br/>" +
-      "<label for='body'>Body:</label> <textarea name='post[body]'>\nBack to the hill and over it again!</textarea><br/>" +
+      "<label for='title'>Title:</label> <input name='post[title]' type='text' value='Hello World' /><br/>" \
+      "<label for='body'>Body:</label> <textarea name='post[body]'>\nBack to the hill and over it again!</textarea><br/>" \
       "<label for='secret'>Secret:</label> <input name='post[secret]' type='hidden' value='0' /><input name='post[secret]' checked='checked' type='checkbox' value='1' /><br/>"
     end
 
@@ -2012,8 +2012,8 @@ class FormWithActsLikeFormForTest < FormWithTest
     end
 
     expected =
-      "<label for='title'>Title:</label> <input name='post[title]' type='text' value='Hello World' /><br/>" +
-      "<label for='body'>Body:</label> <textarea name='post[body]'>\nBack to the hill and over it again!</textarea><br/>" +
+      "<label for='title'>Title:</label> <input name='post[title]' type='text' value='Hello World' /><br/>" \
+      "<label for='body'>Body:</label> <textarea name='post[body]'>\nBack to the hill and over it again!</textarea><br/>" \
       "<label for='secret'>Secret:</label> <input name='post[secret]' type='hidden' value='0' /><input name='post[secret]' checked='checked' type='checkbox' value='1' /><br/>"
 
     assert_dom_equal expected, output_buffer
diff --git a/actionview/test/template/form_helper_test.rb b/actionview/test/template/form_helper_test.rb
index 2bc0434771..83231d5277 100644
--- a/actionview/test/template/form_helper_test.rb
+++ b/actionview/test/template/form_helper_test.rb
@@ -1515,13 +1515,13 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "create-post", "edit_post", method: "patch") do
-      "<label for='post_title'>The Title</label>" +
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
-      "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />" +
-      "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />" +
-      "<button name='button' type='submit'>Create post</button>" +
+      "<label for='post_title'>The Title</label>" \
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
+      "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />" \
+      "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />" \
+      "<button name='button' type='submit'>Create post</button>" \
       "<button name='button' type='submit'><span>Create post</span></button>"
     end
 
@@ -1536,10 +1536,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post", "new_post") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<input id='post_active_true' name='post[active]' type='radio' value='true' />" +
-      "<label for='post_active_true'>true</label>" +
-      "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<input id='post_active_true' name='post[active]' type='radio' value='true' />" \
+      "<label for='post_active_true'>true</label>" \
+      "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" \
       "<label for='post_active_false'>false</label>"
     end
 
@@ -1558,12 +1558,12 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post", "new_post") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<label for='post_active_true'>" +
-      "<input id='post_active_true' name='post[active]' type='radio' value='true' />" +
-      "true</label>" +
-      "<label for='post_active_false'>" +
-      "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<label for='post_active_true'>" \
+      "<input id='post_active_true' name='post[active]' type='radio' value='true' />" \
+      "true</label>" \
+      "<label for='post_active_false'>" \
+      "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" \
       "false</label>"
     end
 
@@ -1584,13 +1584,13 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post_1", "new_post") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<label for='post_active_true'>" +
-      "<input id='post_active_true' name='post[active]' type='radio' value='true' />" +
-      "true</label>" +
-      "<label for='post_active_false'>" +
-      "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" +
-      "false</label>" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<label for='post_active_true'>" \
+      "<input id='post_active_true' name='post[active]' type='radio' value='true' />" \
+      "true</label>" \
+      "<label for='post_active_false'>" \
+      "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" \
+      "false</label>" \
       "<input id='post_id' name='post[id]' type='hidden' value='1' />"
     end
 
@@ -1606,10 +1606,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "foo_new_post", "new_post") do
-      "<input type='hidden' name='post[active]' value='' />" +
-      "<input id='foo_post_active_true' name='post[active]' type='radio' value='true' />" +
-      "<label for='foo_post_active_true'>true</label>" +
-      "<input checked='checked' id='foo_post_active_false' name='post[active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[active]' value='' />" \
+      "<input id='foo_post_active_true' name='post[active]' type='radio' value='true' />" \
+      "<label for='foo_post_active_true'>true</label>" \
+      "<input checked='checked' id='foo_post_active_false' name='post[active]' type='radio' value='false' />" \
       "<label for='foo_post_active_false'>false</label>"
     end
 
@@ -1625,10 +1625,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post", "new_post") do
-      "<input type='hidden' name='post[1][active]' value='' />" +
-      "<input id='post_1_active_true' name='post[1][active]' type='radio' value='true' />" +
-      "<label for='post_1_active_true'>true</label>" +
-      "<input checked='checked' id='post_1_active_false' name='post[1][active]' type='radio' value='false' />" +
+      "<input type='hidden' name='post[1][active]' value='' />" \
+      "<input id='post_1_active_true' name='post[1][active]' type='radio' value='true' />" \
+      "<label for='post_1_active_true'>true</label>" \
+      "<input checked='checked' id='post_1_active_false' name='post[1][active]' type='radio' value='false' />" \
       "<label for='post_1_active_false'>false</label>"
     end
 
@@ -1644,12 +1644,12 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post", "new_post") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<input checked='checked' id='post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" +
-      "<label for='post_tag_ids_1'>Tag 1</label>" +
-      "<input id='post_tag_ids_2' name='post[tag_ids][]' type='checkbox' value='2' />" +
-      "<label for='post_tag_ids_2'>Tag 2</label>" +
-      "<input checked='checked' id='post_tag_ids_3' name='post[tag_ids][]' type='checkbox' value='3' />" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<input checked='checked' id='post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" \
+      "<label for='post_tag_ids_1'>Tag 1</label>" \
+      "<input id='post_tag_ids_2' name='post[tag_ids][]' type='checkbox' value='2' />" \
+      "<label for='post_tag_ids_2'>Tag 2</label>" \
+      "<input checked='checked' id='post_tag_ids_3' name='post[tag_ids][]' type='checkbox' value='3' />" \
       "<label for='post_tag_ids_3'>Tag 3</label>"
     end
 
@@ -1668,15 +1668,15 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post", "new_post") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<label for='post_tag_ids_1'>" +
-      "<input checked='checked' id='post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" +
-      "Tag 1</label>" +
-      "<label for='post_tag_ids_2'>" +
-      "<input id='post_tag_ids_2' name='post[tag_ids][]' type='checkbox' value='2' />" +
-      "Tag 2</label>" +
-      "<label for='post_tag_ids_3'>" +
-      "<input checked='checked' id='post_tag_ids_3' name='post[tag_ids][]' type='checkbox' value='3' />" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<label for='post_tag_ids_1'>" \
+      "<input checked='checked' id='post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" \
+      "Tag 1</label>" \
+      "<label for='post_tag_ids_2'>" \
+      "<input id='post_tag_ids_2' name='post[tag_ids][]' type='checkbox' value='2' />" \
+      "Tag 2</label>" \
+      "<label for='post_tag_ids_3'>" \
+      "<input checked='checked' id='post_tag_ids_3' name='post[tag_ids][]' type='checkbox' value='3' />" \
       "Tag 3</label>"
     end
 
@@ -1698,16 +1698,16 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post_1", "new_post") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<label for='post_tag_ids_1'>" +
-      "<input checked='checked' id='post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" +
-      "Tag 1</label>" +
-      "<label for='post_tag_ids_2'>" +
-      "<input id='post_tag_ids_2' name='post[tag_ids][]' type='checkbox' value='2' />" +
-      "Tag 2</label>" +
-      "<label for='post_tag_ids_3'>" +
-      "<input checked='checked' id='post_tag_ids_3' name='post[tag_ids][]' type='checkbox' value='3' />" +
-      "Tag 3</label>" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<label for='post_tag_ids_1'>" \
+      "<input checked='checked' id='post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" \
+      "Tag 1</label>" \
+      "<label for='post_tag_ids_2'>" \
+      "<input id='post_tag_ids_2' name='post[tag_ids][]' type='checkbox' value='2' />" \
+      "Tag 2</label>" \
+      "<label for='post_tag_ids_3'>" \
+      "<input checked='checked' id='post_tag_ids_3' name='post[tag_ids][]' type='checkbox' value='3' />" \
+      "Tag 3</label>" \
       "<input id='post_id' name='post[id]' type='hidden' value='1' />"
     end
 
@@ -1724,8 +1724,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "foo_new_post", "new_post") do
-      "<input name='post[tag_ids][]' type='hidden' value='' />" +
-      "<input checked='checked' id='foo_post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" +
+      "<input name='post[tag_ids][]' type='hidden' value='' />" \
+      "<input checked='checked' id='foo_post_tag_ids_1' name='post[tag_ids][]' type='checkbox' value='1' />" \
       "<label for='foo_post_tag_ids_1'>Tag 1</label>"
     end
 
@@ -1742,8 +1742,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts", "new_post", "new_post") do
-      "<input name='post[1][tag_ids][]' type='hidden' value='' />" +
-      "<input checked='checked' id='post_1_tag_ids_1' name='post[1][tag_ids][]' type='checkbox' value='1' />" +
+      "<input name='post[1][tag_ids][]' type='hidden' value='' />" \
+      "<input checked='checked' id='post_1_tag_ids_1' name='post[1][tag_ids][]' type='checkbox' value='1' />" \
       "<label for='post_1_tag_ids_1'>Tag 1</label>"
     end
 
@@ -1797,7 +1797,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/44", "edit_post_44", "edit_post", method: "patch") do
-      "<input name='post[title]' type='text' id='post_title' value='And his name will be forty and four.' />" +
+      "<input name='post[title]' type='text' id='post_title' value='And his name will be forty and four.' />" \
       "<input name='commit' data-disable-with='Edit post' type='submit' value='Edit post' />"
     end
 
@@ -1814,11 +1814,11 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "create-post", "edit_other_name", method: "patch") do
-      "<label for='other_name_title' class='post_title'>Title</label>" +
-      "<input name='other_name[title]' id='other_name_title' value='Hello World' type='text' />" +
-      "<textarea name='other_name[body]' id='other_name_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='other_name[secret]' value='0' type='hidden' />" +
-      "<input name='other_name[secret]' checked='checked' id='other_name_secret' value='1' type='checkbox' />" +
+      "<label for='other_name_title' class='post_title'>Title</label>" \
+      "<input name='other_name[title]' id='other_name_title' value='Hello World' type='text' />" \
+      "<textarea name='other_name[body]' id='other_name_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='other_name[secret]' value='0' type='hidden' />" \
+      "<input name='other_name[secret]' checked='checked' id='other_name_secret' value='1' type='checkbox' />" \
       "<input name='commit' value='Create post' data-disable-with='Create post' type='submit' />"
     end
 
@@ -1847,9 +1847,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/", "create-post", "edit_post", method: "delete") do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
     end
 
@@ -1864,9 +1864,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/", "create-post", "edit_post", method: "delete") do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
     end
 
@@ -1895,9 +1895,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/", "create-post", "edit_post", method: "patch", remote: true) do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
     end
 
@@ -1936,9 +1936,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/", "create-post", "edit_post", method: "patch", remote: true) do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
     end
 
@@ -1955,9 +1955,9 @@ class FormHelperTest < ActionView::TestCase
       end
 
       expected = whole_form("/posts", "new_post", "new_post", remote: true) do
-        "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-        "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-        "<input name='post[secret]' type='hidden' value='0' />" +
+        "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+        "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+        "<input name='post[secret]' type='hidden' value='0' />" \
         "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
       end
 
@@ -1973,9 +1973,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/", "create-post") do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
     end
 
@@ -1991,10 +1991,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post[]", "edit_post[]", method: "patch") do
-      "<label for='post_123_title'>Title</label>" +
-      "<input name='post[123][title]' type='text' id='post_123_title' value='Hello World' />" +
-      "<textarea name='post[123][body]' id='post_123_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[123][secret]' type='hidden' value='0' />" +
+      "<label for='post_123_title'>Title</label>" \
+      "<input name='post[123][title]' type='text' id='post_123_title' value='Hello World' />" \
+      "<textarea name='post[123][body]' id='post_123_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[123][secret]' type='hidden' value='0' />" \
       "<input name='post[123][secret]' checked='checked' type='checkbox' id='post_123_secret' value='1' />"
     end
 
@@ -2009,9 +2009,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post[]", "edit_post[]", method: "patch") do
-      "<input name='post[][title]' type='text' id='post__title' value='Hello World' />" +
-      "<textarea name='post[][body]' id='post__body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[][secret]' type='hidden' value='0' />" +
+      "<input name='post[][title]' type='text' id='post__title' value='Hello World' />" \
+      "<textarea name='post[][body]' id='post__body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[][secret]' type='hidden' value='0' />" \
       "<input name='post[][secret]' checked='checked' type='checkbox' id='post__secret' value='1' />"
     end
 
@@ -2026,8 +2026,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" +
-      "<div class='field_with_errors'><input name='post[author_name]' type='text' id='post_author_name' value='' /></div>" +
+      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" \
+      "<div class='field_with_errors'><input name='post[author_name]' type='text' id='post_author_name' value='' /></div>" \
       "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />"
     end
 
@@ -2044,8 +2044,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" +
-      "<div class='field_with_errors'><input name='post[author_name]' type='text' id='post_author_name' value='' /></div>" +
+      "<div class='field_with_errors'><label for='post_author_name' class='label'>Author name</label></div>" \
+      "<div class='field_with_errors'><input name='post[author_name]' type='text' id='post_author_name' value='' /></div>" \
       "<input name='commit' data-disable-with='Create post' type='submit' value='Create post' />"
     end
 
@@ -2059,7 +2059,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      "<div class='field_with_errors'><label for='post_author_name' class='label'>Name</label></div>" +
+      "<div class='field_with_errors'><label for='post_author_name' class='label'>Name</label></div>" \
       "<div class='field_with_errors'><label for='post_author_name' class='label'>Name</label></div>"
     end
 
@@ -2074,9 +2074,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "namespace_edit_post_123", "edit_post", method: "patch") do
-      "<input name='post[title]' type='text' id='namespace_post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='namespace_post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='namespace_post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='namespace_post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='namespace_post_secret' value='1' />"
     end
 
@@ -2098,7 +2098,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "namespace_edit_post_123", "edit_post", method: "patch") do
-      "<label for='namespace_post_title'>Title</label>" +
+      "<label for='namespace_post_title'>Title</label>" \
       "<input name='post[title]' type='text' id='namespace_post_title' value='Hello World' />"
     end
 
@@ -2124,7 +2124,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected_1 = whole_form("/posts/123", "namespace_1_edit_post_123", "edit_post", method: "patch") do
-      "<label for='namespace_1_post_title'>Title</label>" +
+      "<label for='namespace_1_post_title'>Title</label>" \
       "<input name='post[title]' type='text' id='namespace_1_post_title' value='Hello World' />"
     end
 
@@ -2136,7 +2136,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected_2 = whole_form("/posts/123", "namespace_2_edit_post_123", "edit_post", method: "patch") do
-      "<label for='namespace_2_post_title'>Title</label>" +
+      "<label for='namespace_2_post_title'>Title</label>" \
       "<input name='post[title]' type='text' id='namespace_2_post_title' value='Hello World' />"
     end
 
@@ -2154,8 +2154,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "namespace_edit_post_123", "edit_post", method: "patch") do
-      "<input name='post[title]' type='text' id='namespace_post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='namespace_post_body'>\nBack to the hill and over it again!</textarea>" +
+      "<input name='post[title]' type='text' id='namespace_post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='namespace_post_body'>\nBack to the hill and over it again!</textarea>" \
       "<input name='post[comment][body]' type='text' id='namespace_post_comment_body' value='Hello World' />"
     end
 
@@ -2266,8 +2266,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post[]", "edit_post[]", method: "patch") do
-      "<input name='post[123][title]' type='text' id='post_123_title' value='Hello World' />" +
-      "<input name='post[123][comment][][name]' type='text' id='post_123_comment__name' value='new comment' />" +
+      "<input name='post[123][title]' type='text' id='post_123_title' value='Hello World' />" \
+      "<input name='post[123][comment][][name]' type='text' id='post_123_comment__name' value='new comment' />" \
       "<input name='post[123][body]' type='text' id='post_123_body' value='Back to the hill and over it again!' />"
     end
 
@@ -2283,7 +2283,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      "<input name='post[1][title]' type='text' id='post_1_title' value='Hello World' />" +
+      "<input name='post[1][title]' type='text' id='post_1_title' value='Hello World' />" \
       "<input name='post[1][comment][1][name]' type='text' id='post_1_comment_1_name' value='new comment' />"
     end
 
@@ -2393,7 +2393,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
         '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="new author" />'
     end
 
@@ -2420,8 +2420,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' \
       '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />'
     end
 
@@ -2439,8 +2439,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' \
       '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />'
     end
 
@@ -2458,7 +2458,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
       '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />'
     end
 
@@ -2476,7 +2476,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
       '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />'
     end
 
@@ -2494,8 +2494,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' \
       '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />'
     end
 
@@ -2514,8 +2514,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />' \
       '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />'
     end
 
@@ -2535,10 +2535,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -2562,10 +2562,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' +
-      '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' \
+      '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -2589,9 +2589,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -2615,10 +2615,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' +
-      '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_author_attributes_name" name="post[author_attributes][name]" type="text" value="author #321" />' \
+      '<input id="post_author_attributes_id" name="post[author_attributes][id]" type="hidden" value="321" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -2638,10 +2638,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -2662,10 +2662,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />'
     end
 
@@ -2685,8 +2685,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="new comment" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="new comment" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="new comment" />'
     end
 
@@ -2706,9 +2706,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #321" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="321" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #321" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="321" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="new comment" />'
     end
 
@@ -2741,10 +2741,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -2762,10 +2762,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -2797,10 +2797,10 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' +
-      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #1" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="1" />' \
+      '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="comment #2" />' \
       '<input id="post_comments_attributes_1_id" name="post[comments_attributes][1][id]" type="hidden" value="2" />'
     end
 
@@ -2820,9 +2820,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' +
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #321" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="321" />' +
+      '<input name="post[title]" type="text" id="post_title" value="Hello World" />' \
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #321" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="321" />' \
       '<input id="post_comments_attributes_1_name" name="post[comments_attributes][1][name]" type="text" value="new comment" />'
     end
 
@@ -2840,7 +2840,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input id="post_comments_attributes_abc_name" name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' +
+      '<input id="post_comments_attributes_abc_name" name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' \
       '<input id="post_comments_attributes_abc_id" name="post[comments_attributes][abc][id]" type="hidden" value="321" />'
     end
 
@@ -2857,7 +2857,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input id="post_comments_attributes_abc_name" name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' +
+      '<input id="post_comments_attributes_abc_name" name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' \
       '<input id="post_comments_attributes_abc_id" name="post[comments_attributes][abc][id]" type="hidden" value="321" />'
     end
 
@@ -2880,7 +2880,7 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input id="post_comments_attributes_abc_name" name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' +
+      '<input id="post_comments_attributes_abc_name" name="post[comments_attributes][abc][name]" type="text" value="comment #321" />' \
       '<input id="post_comments_attributes_abc_id" name="post[comments_attributes][abc][id]" type="hidden" value="321" />'
     end
 
@@ -2966,17 +2966,17 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #321" />' +
-      '<input id="post_comments_attributes_0_relevances_attributes_0_value" name="post[comments_attributes][0][relevances_attributes][0][value]" type="text" value="commentrelevance #314" />' +
-      '<input id="post_comments_attributes_0_relevances_attributes_0_id" name="post[comments_attributes][0][relevances_attributes][0][id]" type="hidden" value="314" />' +
-      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="321" />' +
-      '<input id="post_tags_attributes_0_value" name="post[tags_attributes][0][value]" type="text" value="tag #123" />' +
-      '<input id="post_tags_attributes_0_relevances_attributes_0_value" name="post[tags_attributes][0][relevances_attributes][0][value]" type="text" value="tagrelevance #3141" />' +
-      '<input id="post_tags_attributes_0_relevances_attributes_0_id" name="post[tags_attributes][0][relevances_attributes][0][id]" type="hidden" value="3141" />' +
-      '<input id="post_tags_attributes_0_id" name="post[tags_attributes][0][id]" type="hidden" value="123" />' +
-      '<input id="post_tags_attributes_1_value" name="post[tags_attributes][1][value]" type="text" value="tag #456" />' +
-      '<input id="post_tags_attributes_1_relevances_attributes_0_value" name="post[tags_attributes][1][relevances_attributes][0][value]" type="text" value="tagrelevance #31415" />' +
-      '<input id="post_tags_attributes_1_relevances_attributes_0_id" name="post[tags_attributes][1][relevances_attributes][0][id]" type="hidden" value="31415" />' +
+      '<input id="post_comments_attributes_0_name" name="post[comments_attributes][0][name]" type="text" value="comment #321" />' \
+      '<input id="post_comments_attributes_0_relevances_attributes_0_value" name="post[comments_attributes][0][relevances_attributes][0][value]" type="text" value="commentrelevance #314" />' \
+      '<input id="post_comments_attributes_0_relevances_attributes_0_id" name="post[comments_attributes][0][relevances_attributes][0][id]" type="hidden" value="314" />' \
+      '<input id="post_comments_attributes_0_id" name="post[comments_attributes][0][id]" type="hidden" value="321" />' \
+      '<input id="post_tags_attributes_0_value" name="post[tags_attributes][0][value]" type="text" value="tag #123" />' \
+      '<input id="post_tags_attributes_0_relevances_attributes_0_value" name="post[tags_attributes][0][relevances_attributes][0][value]" type="text" value="tagrelevance #3141" />' \
+      '<input id="post_tags_attributes_0_relevances_attributes_0_id" name="post[tags_attributes][0][relevances_attributes][0][id]" type="hidden" value="3141" />' \
+      '<input id="post_tags_attributes_0_id" name="post[tags_attributes][0][id]" type="hidden" value="123" />' \
+      '<input id="post_tags_attributes_1_value" name="post[tags_attributes][1][value]" type="text" value="tag #456" />' \
+      '<input id="post_tags_attributes_1_relevances_attributes_0_value" name="post[tags_attributes][1][relevances_attributes][0][value]" type="text" value="tagrelevance #31415" />' \
+      '<input id="post_tags_attributes_1_relevances_attributes_0_id" name="post[tags_attributes][1][relevances_attributes][0][id]" type="hidden" value="31415" />' \
       '<input id="post_tags_attributes_1_id" name="post[tags_attributes][1][id]" type="hidden" value="456" />'
     end
 
@@ -3007,9 +3007,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -3023,9 +3023,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<input name='post[123][title]' type='text' id='post_123_title' value='Hello World' />" +
-      "<textarea name='post[123][body]' id='post_123_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[123][secret]' type='hidden' value='0' />" +
+      "<input name='post[123][title]' type='text' id='post_123_title' value='Hello World' />" \
+      "<textarea name='post[123][body]' id='post_123_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[123][secret]' type='hidden' value='0' />" \
       "<input name='post[123][secret]' checked='checked' type='checkbox' id='post_123_secret' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -3039,9 +3039,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<input name='post[][title]' type='text' id='post__title' value='Hello World' />" +
-      "<textarea name='post[][body]' id='post__body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[][secret]' type='hidden' value='0' />" +
+      "<input name='post[][title]' type='text' id='post__title' value='Hello World' />" \
+      "<textarea name='post[][body]' id='post__body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[][secret]' type='hidden' value='0' />" \
       "<input name='post[][secret]' checked='checked' type='checkbox' id='post__secret' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -3055,9 +3055,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<input name='post[abc][title]' type='text' id='post_abc_title' value='Hello World' />" +
-      "<textarea name='post[abc][body]' id='post_abc_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[abc][secret]' type='hidden' value='0' />" +
+      "<input name='post[abc][title]' type='text' id='post_abc_title' value='Hello World' />" \
+      "<textarea name='post[abc][body]' id='post_abc_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[abc][secret]' type='hidden' value='0' />" \
       "<input name='post[abc][secret]' checked='checked' type='checkbox' id='post_abc_secret' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -3071,9 +3071,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -3087,9 +3087,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='post[secret]' type='hidden' value='0' />" \
       "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />"
 
     assert_dom_equal expected, output_buffer
@@ -3101,7 +3101,7 @@ class FormHelperTest < ActionView::TestCase
       concat f.text_field(:title)
     end
 
-    assert_dom_equal "<label for=\"author_post_title\">Title</label>" +
+    assert_dom_equal "<label for=\"author_post_title\">Title</label>" \
     "<input name='author[post][title]' type='text' id='author_post_title' value='Hello World' />",
       output_buffer
   end
@@ -3112,7 +3112,7 @@ class FormHelperTest < ActionView::TestCase
       concat f.text_field(:title)
     end
 
-    assert_dom_equal "<label for=\"author_post_1_title\">Title</label>" +
+    assert_dom_equal "<label for=\"author_post_1_title\">Title</label>" \
       "<input name='author[post][1][title]' type='text' id='author_post_1_title' value='Hello World' />",
       output_buffer
   end
@@ -3132,9 +3132,9 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "create-post", "edit_post", method: "patch") do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
-      "<input name='parent_post[secret]' type='hidden' value='0' />" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
+      "<input name='parent_post[secret]' type='hidden' value='0' />" \
       "<input name='parent_post[secret]' checked='checked' type='checkbox' id='parent_post_secret' value='1' />"
     end
 
@@ -3152,8 +3152,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "create-post", "edit_post", method: "patch") do
-      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" +
-      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" +
+      "<input name='post[title]' type='text' id='post_title' value='Hello World' />" \
+      "<textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea>" \
       "<input name='post[comment][name]' type='text' id='post_comment_name' value='new comment' />"
     end
 
@@ -3192,8 +3192,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      "<label for='title'>Title:</label> <input name='post[title]' type='text' id='post_title' value='Hello World' /><br/>" +
-      "<label for='body'>Body:</label> <textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea><br/>" +
+      "<label for='title'>Title:</label> <input name='post[title]' type='text' id='post_title' value='Hello World' /><br/>" \
+      "<label for='body'>Body:</label> <textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea><br/>" \
       "<label for='secret'>Secret:</label> <input name='post[secret]' type='hidden' value='0' /><input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' /><br/>"
     end
 
@@ -3211,8 +3211,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected = whole_form("/posts/123", "edit_post_123", "edit_post", method: "patch") do
-      "<label for='title'>Title:</label> <input name='post[title]' type='text' id='post_title' value='Hello World' /><br/>" +
-      "<label for='body'>Body:</label> <textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea><br/>" +
+      "<label for='title'>Title:</label> <input name='post[title]' type='text' id='post_title' value='Hello World' /><br/>" \
+      "<label for='body'>Body:</label> <textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea><br/>" \
       "<label for='secret'>Secret:</label> <input name='post[secret]' type='hidden' value='0' /><input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' /><br/>"
     end
 
@@ -3270,8 +3270,8 @@ class FormHelperTest < ActionView::TestCase
     end
 
     expected =
-      "<label for='title'>Title:</label> <input name='post[title]' type='text' id='post_title' value='Hello World' /><br/>" +
-      "<label for='body'>Body:</label> <textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea><br/>" +
+      "<label for='title'>Title:</label> <input name='post[title]' type='text' id='post_title' value='Hello World' /><br/>" \
+      "<label for='body'>Body:</label> <textarea name='post[body]' id='post_body'>\nBack to the hill and over it again!</textarea><br/>" \
       "<label for='secret'>Secret:</label> <input name='post[secret]' type='hidden' value='0' /><input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' /><br/>"
 
     assert_dom_equal expected, output_buffer
diff --git a/actionview/test/template/form_options_helper_test.rb b/actionview/test/template/form_options_helper_test.rb
index 51f5d25958..258dcdb806 100644
--- a/actionview/test/template/form_options_helper_test.rb
+++ b/actionview/test/template/form_options_helper_test.rb
@@ -393,30 +393,30 @@ class FormOptionsHelperTest < ActionView::TestCase
 
   def test_time_zone_options_no_params
     opts = time_zone_options_for_select
-    assert_dom_equal "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\">D</option>\n" +
+    assert_dom_equal "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\">D</option>\n" \
                  "<option value=\"E\">E</option>",
                  opts
   end
 
   def test_time_zone_options_with_selected
     opts = time_zone_options_for_select("D")
-    assert_dom_equal "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
+    assert_dom_equal "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
                  "<option value=\"E\">E</option>",
                  opts
   end
 
   def test_time_zone_options_with_unknown_selected
     opts = time_zone_options_for_select("K")
-    assert_dom_equal "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\">D</option>\n" +
+    assert_dom_equal "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\">D</option>\n" \
                  "<option value=\"E\">E</option>",
                  opts
   end
@@ -424,11 +424,11 @@ class FormOptionsHelperTest < ActionView::TestCase
   def test_time_zone_options_with_priority_zones
     zones = [ ActiveSupport::TimeZone.new("B"), ActiveSupport::TimeZone.new("E") ]
     opts = time_zone_options_for_select(nil, zones)
-    assert_dom_equal "<option value=\"B\">B</option>\n" +
-                 "<option value=\"E\">E</option>" +
-                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
+    assert_dom_equal "<option value=\"B\">B</option>\n" \
+                 "<option value=\"E\">E</option>" \
+                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
                  "<option value=\"D\">D</option>",
                  opts
   end
@@ -436,11 +436,11 @@ class FormOptionsHelperTest < ActionView::TestCase
   def test_time_zone_options_with_selected_priority_zones
     zones = [ ActiveSupport::TimeZone.new("B"), ActiveSupport::TimeZone.new("E") ]
     opts = time_zone_options_for_select("E", zones)
-    assert_dom_equal "<option value=\"B\">B</option>\n" +
-                 "<option value=\"E\" selected=\"selected\">E</option>" +
-                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
+    assert_dom_equal "<option value=\"B\">B</option>\n" \
+                 "<option value=\"E\" selected=\"selected\">E</option>" \
+                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
                  "<option value=\"D\">D</option>",
                  opts
   end
@@ -448,11 +448,11 @@ class FormOptionsHelperTest < ActionView::TestCase
   def test_time_zone_options_with_unselected_priority_zones
     zones = [ ActiveSupport::TimeZone.new("B"), ActiveSupport::TimeZone.new("E") ]
     opts = time_zone_options_for_select("C", zones)
-    assert_dom_equal "<option value=\"B\">B</option>\n" +
-                 "<option value=\"E\">E</option>" +
-                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"C\" selected=\"selected\">C</option>\n" +
+    assert_dom_equal "<option value=\"B\">B</option>\n" \
+                 "<option value=\"E\">E</option>" \
+                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"C\" selected=\"selected\">C</option>\n" \
                  "<option value=\"D\">D</option>",
                  opts
   end
@@ -1031,12 +1031,12 @@ class FormOptionsHelperTest < ActionView::TestCase
   def test_time_zone_select
     @firm = Firm.new("D")
     html = time_zone_select("firm", "time_zone")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
   end
@@ -1049,12 +1049,12 @@ class FormOptionsHelperTest < ActionView::TestCase
     end
 
     assert_dom_equal(
-      "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-      "<option value=\"A\">A</option>\n" +
-      "<option value=\"B\">B</option>\n" +
-      "<option value=\"C\">C</option>\n" +
-      "<option value=\"D\" selected=\"selected\">D</option>\n" +
-      "<option value=\"E\">E</option>" +
+      "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+      "<option value=\"A\">A</option>\n" \
+      "<option value=\"B\">B</option>\n" \
+      "<option value=\"C\">C</option>\n" \
+      "<option value=\"D\" selected=\"selected\">D</option>\n" \
+      "<option value=\"E\">E</option>" \
       "</select>",
       output_buffer
     )
@@ -1068,12 +1068,12 @@ class FormOptionsHelperTest < ActionView::TestCase
     end
 
     assert_dom_equal(
-      "<select id=\"firm_305_time_zone\" name=\"firm[305][time_zone]\">" +
-      "<option value=\"A\">A</option>\n" +
-      "<option value=\"B\">B</option>\n" +
-      "<option value=\"C\">C</option>\n" +
-      "<option value=\"D\" selected=\"selected\">D</option>\n" +
-      "<option value=\"E\">E</option>" +
+      "<select id=\"firm_305_time_zone\" name=\"firm[305][time_zone]\">" \
+      "<option value=\"A\">A</option>\n" \
+      "<option value=\"B\">B</option>\n" \
+      "<option value=\"C\">C</option>\n" \
+      "<option value=\"D\" selected=\"selected\">D</option>\n" \
+      "<option value=\"E\">E</option>" \
       "</select>",
       output_buffer
     )
@@ -1088,12 +1088,12 @@ class FormOptionsHelperTest < ActionView::TestCase
     end
 
     assert_dom_equal(
-      "<select id=\"firm_305_time_zone\" name=\"firm[305][time_zone]\">" +
-      "<option value=\"A\">A</option>\n" +
-      "<option value=\"B\">B</option>\n" +
-      "<option value=\"C\">C</option>\n" +
-      "<option value=\"D\" selected=\"selected\">D</option>\n" +
-      "<option value=\"E\">E</option>" +
+      "<select id=\"firm_305_time_zone\" name=\"firm[305][time_zone]\">" \
+      "<option value=\"A\">A</option>\n" \
+      "<option value=\"B\">B</option>\n" \
+      "<option value=\"C\">C</option>\n" \
+      "<option value=\"D\" selected=\"selected\">D</option>\n" \
+      "<option value=\"E\">E</option>" \
       "</select>",
       output_buffer
     )
@@ -1102,13 +1102,13 @@ class FormOptionsHelperTest < ActionView::TestCase
   def test_time_zone_select_with_blank
     @firm = Firm.new("D")
     html = time_zone_select("firm", "time_zone", nil, include_blank: true)
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                 "<option value=\"\"></option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                 "<option value=\"\"></option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
   end
@@ -1116,13 +1116,13 @@ class FormOptionsHelperTest < ActionView::TestCase
   def test_time_zone_select_with_blank_as_string
     @firm = Firm.new("D")
     html = time_zone_select("firm", "time_zone", nil, include_blank: "No Zone")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                 "<option value=\"\">No Zone</option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                 "<option value=\"\">No Zone</option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
   end
@@ -1131,12 +1131,12 @@ class FormOptionsHelperTest < ActionView::TestCase
     @firm = Firm.new("D")
     html = time_zone_select("firm", "time_zone", nil, {},
       "style" => "color: red")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\" style=\"color: red\">" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\" style=\"color: red\">" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
     assert_dom_equal html, time_zone_select("firm", "time_zone", nil, {},
@@ -1147,13 +1147,13 @@ class FormOptionsHelperTest < ActionView::TestCase
     @firm = Firm.new("D")
     html = time_zone_select("firm", "time_zone", nil,
       { include_blank: true }, "style" => "color: red")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\" style=\"color: red\">" +
-                 "<option value=\"\"></option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\" style=\"color: red\">" \
+                 "<option value=\"\"></option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
     assert_dom_equal html, time_zone_select("firm", "time_zone", nil,
@@ -1164,13 +1164,13 @@ class FormOptionsHelperTest < ActionView::TestCase
     @firm = Firm.new("D")
     html = time_zone_select("firm", "time_zone", nil,
       { include_blank: "No Zone" }, "style" => "color: red")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\" style=\"color: red\">" +
-                 "<option value=\"\">No Zone</option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\" style=\"color: red\">" \
+                 "<option value=\"\">No Zone</option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
     assert_dom_equal html, time_zone_select("firm", "time_zone", nil,
@@ -1181,13 +1181,13 @@ class FormOptionsHelperTest < ActionView::TestCase
     @firm = Firm.new("D")
     zones = [ ActiveSupport::TimeZone.new("A"), ActiveSupport::TimeZone.new("D") ]
     html = time_zone_select("firm", "time_zone", zones)
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>" +
-                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>" \
+                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
   end
@@ -1200,13 +1200,13 @@ class FormOptionsHelperTest < ActionView::TestCase
     end
 
     html = time_zone_select("firm", "time_zone", /A|D/)
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>" +
-                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>" \
+                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
   end
@@ -1221,13 +1221,13 @@ class FormOptionsHelperTest < ActionView::TestCase
     end
 
     html = time_zone_select("firm", "time_zone", /A|D/)
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" +
-                 "<option value=\"A\">A</option>\n" +
-                 "<option value=\"B\">B</option>\n" +
-                 "<option value=\"C\">C</option>\n" +
-                 "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                 "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                 "<option value=\"\" disabled=\"disabled\">-------------</option>\n" \
+                 "<option value=\"A\">A</option>\n" \
+                 "<option value=\"B\">B</option>\n" \
+                 "<option value=\"C\">C</option>\n" \
+                 "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                 "<option value=\"E\">E</option>" \
                  "</select>",
                  html
   end
@@ -1237,12 +1237,12 @@ class FormOptionsHelperTest < ActionView::TestCase
     @firm.time_zone = nil
 
     html = time_zone_select("firm", "time_zone", nil, default: "B")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                  "<option value=\"A\">A</option>\n" +
-                  "<option value=\"B\" selected=\"selected\">B</option>\n" +
-                  "<option value=\"C\">C</option>\n" +
-                  "<option value=\"D\">D</option>\n" +
-                  "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                  "<option value=\"A\">A</option>\n" \
+                  "<option value=\"B\" selected=\"selected\">B</option>\n" \
+                  "<option value=\"C\">C</option>\n" \
+                  "<option value=\"D\">D</option>\n" \
+                  "<option value=\"E\">E</option>" \
                   "</select>",
                   html
   end
@@ -1251,12 +1251,12 @@ class FormOptionsHelperTest < ActionView::TestCase
     @firm = Firm.new("D")
 
     html = time_zone_select("firm", "time_zone", nil, default: "B")
-    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" +
-                  "<option value=\"A\">A</option>\n" +
-                  "<option value=\"B\">B</option>\n" +
-                  "<option value=\"C\">C</option>\n" +
-                  "<option value=\"D\" selected=\"selected\">D</option>\n" +
-                  "<option value=\"E\">E</option>" +
+    assert_dom_equal "<select id=\"firm_time_zone\" name=\"firm[time_zone]\">" \
+                  "<option value=\"A\">A</option>\n" \
+                  "<option value=\"B\">B</option>\n" \
+                  "<option value=\"C\">C</option>\n" \
+                  "<option value=\"D\" selected=\"selected\">D</option>\n" \
+                  "<option value=\"E\">E</option>" \
                   "</select>",
                   html
   end
diff --git a/actionview/test/template/render_test.rb b/actionview/test/template/render_test.rb
index 2651d6ff73..d189b2aa87 100644
--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -220,15 +220,15 @@ module RenderTestCases
 
   def test_render_partial_with_invalid_option_as
     e = assert_raises(ArgumentError) { @view.render(partial: "test/partial_only", as: "a-in") }
-    assert_equal "The value (a-in) of the option `as` is not a valid Ruby identifier; " +
-      "make sure it starts with lowercase letter, " +
+    assert_equal "The value (a-in) of the option `as` is not a valid Ruby identifier; " \
+      "make sure it starts with lowercase letter, " \
       "and is followed by any combination of letters, numbers and underscores.", e.message
   end
 
   def test_render_partial_with_hyphen_and_invalid_option_as
     e = assert_raises(ArgumentError) { @view.render(partial: "test/a-in", as: "a-in") }
-    assert_equal "The value (a-in) of the option `as` is not a valid Ruby identifier; " +
-      "make sure it starts with lowercase letter, " +
+    assert_equal "The value (a-in) of the option `as` is not a valid Ruby identifier; " \
+      "make sure it starts with lowercase letter, " \
       "and is followed by any combination of letters, numbers and underscores.", e.message
   end
 
@@ -424,7 +424,7 @@ module RenderTestCases
   end
 
   CustomHandler = lambda do |template|
-    "@output_buffer = ''\n" +
+    "@output_buffer = ''\n" \
       "@output_buffer << 'source: #{template.source.inspect}'\n"
   end
 
diff --git a/actionview/test/template/url_helper_test.rb b/actionview/test/template/url_helper_test.rb
index 95bea21c8f..09454b32cc 100644
--- a/actionview/test/template/url_helper_test.rb
+++ b/actionview/test/template/url_helper_test.rb
@@ -821,7 +821,7 @@ class TasksController < ActionController::Base
 
   private
     def render_default
-      render inline: "<%= link_to_unless_current('tasks', tasks_path) %>\n" +
+      render inline: "<%= link_to_unless_current('tasks', tasks_path) %>\n" \
         "<%= link_to_unless_current('tasks', tasks_url) %>"
     end
 end
diff --git a/activerecord/lib/active_record/associations/has_one_association.rb b/activerecord/lib/active_record/associations/has_one_association.rb
index b624154def..8458253ff8 100644
--- a/activerecord/lib/active_record/associations/has_one_association.rb
+++ b/activerecord/lib/active_record/associations/has_one_association.rb
@@ -85,7 +85,7 @@ module ActiveRecord
 
             if target.persisted? && owner.persisted? && !target.save
               set_owner_attributes(target)
-              raise RecordNotSaved, "Failed to remove the existing associated #{reflection.name}. " +
+              raise RecordNotSaved, "Failed to remove the existing associated #{reflection.name}. " \
                                     "The record failed to save after its foreign key was set to nil."
             end
           end
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index 4046b3829d..cf2269bf12 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -176,7 +176,7 @@ module ActiveRecord
           if @owner == Thread.current
             msg << "it is already leased by the current thread."
           else
-            msg << "it is already in use by a different thread: #{@owner}. " <<
+            msg << "it is already in use by a different thread: #{@owner}. " \
                    "Current thread: #{Thread.current}."
           end
           raise ActiveRecordError, msg
@@ -194,8 +194,8 @@ module ActiveRecord
       def expire
         if in_use?
           if @owner != Thread.current
-            raise ActiveRecordError, "Cannot expire connection, " <<
-              "it is owned by a different thread: #{@owner}. " <<
+            raise ActiveRecordError, "Cannot expire connection, " \
+              "it is owned by a different thread: #{@owner}. " \
               "Current thread: #{Thread.current}."
           end
 
diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb
index bdb5184599..82604a915f 100644
--- a/activerecord/lib/active_record/tasks/database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/database_tasks.rb
@@ -267,8 +267,8 @@ module ActiveRecord
         if seed_loader
           seed_loader.load_seed
         else
-          raise "You tried to load seed data, but no seed loader is specified. Please specify seed " +
-                "loader with ActiveRecord::Tasks::DatabaseTasks.seed_loader = your_seed_loader\n" +
+          raise "You tried to load seed data, but no seed loader is specified. Please specify seed " \
+                "loader with ActiveRecord::Tasks::DatabaseTasks.seed_loader = your_seed_loader\n" \
                 "Seed loader should respond to load_seed method"
         end
       end
diff --git a/activerecord/test/cases/adapters/postgresql/connection_test.rb b/activerecord/test/cases/adapters/postgresql/connection_test.rb
index 075301d6d5..3cbd4ca212 100644
--- a/activerecord/test/cases/adapters/postgresql/connection_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/connection_test.rb
@@ -156,7 +156,7 @@ module ActiveRecord
         secondary_connection.query("select pg_terminate_backend(#{original_connection_pid.first.first})")
         ActiveRecord::Base.connection_pool.checkin(secondary_connection)
       elsif ARTest.config["with_manual_interventions"]
-        puts "Kill the connection now (e.g. by restarting the PostgreSQL " +
+        puts "Kill the connection now (e.g. by restarting the PostgreSQL " \
           'server with the "-m fast" option) and then press enter.'
         $stdin.gets
       else
@@ -175,7 +175,7 @@ module ActiveRecord
       new_connection_pid = @connection.query("select pg_backend_pid()")
 
       assert_not_equal original_connection_pid, new_connection_pid,
-        "umm -- looks like you didn't break the connection, because we're still " +
+        "umm -- looks like you didn't break the connection, because we're still " \
         "successfully querying with the same connection pid."
 
       # Repair all fixture connections so other tests won't break.
diff --git a/activerecord/test/cases/associations/has_one_associations_test.rb b/activerecord/test/cases/associations/has_one_associations_test.rb
index aa910ba409..fc1e61124c 100644
--- a/activerecord/test/cases/associations/has_one_associations_test.rb
+++ b/activerecord/test/cases/associations/has_one_associations_test.rb
@@ -476,7 +476,7 @@ class HasOneAssociationsTest < ActiveRecord::TestCase
 
     assert_equal ships(:black_pearl), pirate.ship
     assert_equal pirate.id, pirate.ship.pirate_id
-    assert_equal "Failed to remove the existing associated ship. " +
+    assert_equal "Failed to remove the existing associated ship. " \
                  "The record failed to save after its foreign key was set to nil.", error.message
   end
 
diff --git a/activerecord/test/cases/connection_pool_test.rb b/activerecord/test/cases/connection_pool_test.rb
index 81d7113bc6..9f7280634e 100644
--- a/activerecord/test/cases/connection_pool_test.rb
+++ b/activerecord/test/cases/connection_pool_test.rb
@@ -399,7 +399,7 @@ module ActiveRecord
             all_threads_in_new_connection.wait
           end
         rescue Timeout::Error
-          flunk "pool unable to establish connections concurrently or implementation has " <<
+          flunk "pool unable to establish connections concurrently or implementation has " \
                 "changed, this test then needs to patch a different :new_connection method"
         ensure
           # clean up the threads
diff --git a/activerecord/test/cases/nested_attributes_with_callbacks_test.rb b/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
index 350a966d40..b9d2acbed2 100644
--- a/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
+++ b/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
@@ -120,14 +120,14 @@ class NestedAttributesWithCallbacksTest < ActiveRecord::TestCase
     assert_assignment_affects_records_in_target(:birds_with_add)
   end
 
-  test("Assignment updates records in target when not loaded" +
+  test("Assignment updates records in target when not loaded" \
        " and callback loads target") do
     assert_not @pirate.birds_with_add_load.loaded?
     @pirate.birds_with_add_load_attributes = update_new_and_destroy_bird_attributes
     assert_assignment_affects_records_in_target(:birds_with_add_load)
   end
 
-  test("Assignment updates records in target when loaded" +
+  test("Assignment updates records in target when loaded" \
        " and callback loads target") do
     @pirate.birds_with_add_load.load_target
     @pirate.birds_with_add_load_attributes = update_new_and_destroy_bird_attributes
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index 00685cd952..5d90fa2509 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -222,7 +222,7 @@ class StringInflectionsTest < ActiveSupport::TestCase
     original = %{\u205f\u3000 A string surrounded by various unicode spaces,
       with tabs(\t\t), newlines(\n\n), unicode nextlines(\u0085\u0085) and many spaces(  ). \u00a0\u2007}
 
-    expected = "A string surrounded by various unicode spaces, " +
+    expected = "A string surrounded by various unicode spaces, " \
       "with tabs( ), newlines( ), unicode nextlines( ) and many spaces( )."
 
     # Make sure squish returns what we expect:
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 1712feba42..1a6aed7ce4 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -511,7 +511,7 @@ module Rails
 
     def validate_secret_key_config! #:nodoc:
       if secrets.secret_key_base.blank?
-        ActiveSupport::Deprecation.warn "You didn't set `secret_key_base`. " +
+        ActiveSupport::Deprecation.warn "You didn't set `secret_key_base`. " \
           "Read the upgrade documentation to learn more about this new config option."
 
         if secrets.secret_token.blank?
diff --git a/railties/lib/rails/application/bootstrap.rb b/railties/lib/rails/application/bootstrap.rb
index 11da271501..6102af3fff 100644
--- a/railties/lib/rails/application/bootstrap.rb
+++ b/railties/lib/rails/application/bootstrap.rb
@@ -48,8 +48,8 @@ INFO
           logger = ActiveSupport::TaggedLogging.new(ActiveSupport::Logger.new(STDERR))
           logger.level = ActiveSupport::Logger::WARN
           logger.warn(
-            "Rails Error: Unable to access log file. Please ensure that #{path} exists and is writable " +
-            "(ie, make it writable for user and group: chmod 0664 #{path}). " +
+            "Rails Error: Unable to access log file. Please ensure that #{path} exists and is writable " \
+            "(ie, make it writable for user and group: chmod 0664 #{path}). " \
             "The log level has been raised to WARN and the output directed to STDERR until the problem is fixed."
           )
           logger
diff --git a/railties/lib/rails/generators/actions/create_migration.rb b/railties/lib/rails/generators/actions/create_migration.rb
index f677e545e5..d06609e91e 100644
--- a/railties/lib/rails/generators/actions/create_migration.rb
+++ b/railties/lib/rails/generators/actions/create_migration.rb
@@ -54,8 +54,8 @@ module Rails
               say_status :skip, :yellow
             else
               say_status :conflict, :red
-              raise Error, "Another migration is already named #{migration_file_name}: " +
-                "#{existing_migration}. Use --force to replace this migration " +
+              raise Error, "Another migration is already named #{migration_file_name}: " \
+                "#{existing_migration}. Use --force to replace this migration " \
                 "or --skip to ignore conflicted file."
             end
           end
diff --git a/railties/lib/rails/generators/base.rb b/railties/lib/rails/generators/base.rb
index ba031d7b5d..a650c52626 100644
--- a/railties/lib/rails/generators/base.rb
+++ b/railties/lib/rails/generators/base.rb
@@ -256,8 +256,8 @@ module Rails
             last = extract_last_module(nesting)
 
             if last && last.const_defined?(last_name.camelize, false)
-              raise Error, "The name '#{class_name}' is either already used in your application " <<
-                           "or reserved by Ruby on Rails. Please choose an alternative and run "  <<
+              raise Error, "The name '#{class_name}' is either already used in your application " \
+                           "or reserved by Ruby on Rails. Please choose an alternative and run "  \
                            "this generator again."
             end
           end
diff --git a/railties/lib/rails/generators/rails/plugin/plugin_generator.rb b/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
index 4cf4f8cd9a..c7cfa74bda 100644
--- a/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
+++ b/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
@@ -186,7 +186,7 @@ task default: :test
                                   desc: "Skip gemspec file"
 
       class_option :skip_gemfile_entry, type: :boolean, default: false,
-                                        desc: "If creating plugin in application's directory " +
+                                        desc: "If creating plugin in application's directory " \
                                                  "skip adding entry to Gemfile"
 
       class_option :api,          type: :boolean, default: false,