Enforce frozen string in Rubocop

18 files changed, 18 insertions, 0 deletions

diff --git a/actionmailer/lib/action_mailer.rb b/actionmailer/lib/action_mailer.rb
index 8e59f033d0..16dfe53e18 100644
--- a/actionmailer/lib/action_mailer.rb
+++ b/actionmailer/lib/action_mailer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index f8aa54bd44..782c369961 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "mail"
 require "action_mailer/collector"
 require "active_support/core_ext/string/inflections"
diff --git a/actionmailer/lib/action_mailer/collector.rb b/actionmailer/lib/action_mailer/collector.rb
index d97a73d65a..c17715bac2 100644
--- a/actionmailer/lib/action_mailer/collector.rb
+++ b/actionmailer/lib/action_mailer/collector.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_controller/collector"
 require "active_support/core_ext/hash/reverse_merge"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionmailer/lib/action_mailer/delivery_job.rb b/actionmailer/lib/action_mailer/delivery_job.rb
index a617daa87e..010edf5800 100644
--- a/actionmailer/lib/action_mailer/delivery_job.rb
+++ b/actionmailer/lib/action_mailer/delivery_job.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_job"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/delivery_methods.rb b/actionmailer/lib/action_mailer/delivery_methods.rb
index 93ae10fd70..f4897e2b98 100644
--- a/actionmailer/lib/action_mailer/delivery_methods.rb
+++ b/actionmailer/lib/action_mailer/delivery_methods.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "tmpdir"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index f5594ef928..c9bf5b3f75 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionMailer
   # Returns the version of the currently loaded Action Mailer as a <tt>Gem::Version</tt>.
   def self.gem_version
diff --git a/actionmailer/lib/action_mailer/inline_preview_interceptor.rb b/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
index 980415afe0..925926ba46 100644
--- a/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
+++ b/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "base64"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/log_subscriber.rb b/actionmailer/lib/action_mailer/log_subscriber.rb
index 2c058ccf66..4f8aa98aaf 100644
--- a/actionmailer/lib/action_mailer/log_subscriber.rb
+++ b/actionmailer/lib/action_mailer/log_subscriber.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/log_subscriber"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/mail_helper.rb b/actionmailer/lib/action_mailer/mail_helper.rb
index e04fc08866..69b6aebd8f 100644
--- a/actionmailer/lib/action_mailer/mail_helper.rb
+++ b/actionmailer/lib/action_mailer/mail_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionMailer
   # Provides helper methods for ActionMailer::Base that can be used for easily
   # formatting messages, accessing mailer or message instances, and the
diff --git a/actionmailer/lib/action_mailer/message_delivery.rb b/actionmailer/lib/action_mailer/message_delivery.rb
index 0b54e12431..a13a8a7ebe 100644
--- a/actionmailer/lib/action_mailer/message_delivery.rb
+++ b/actionmailer/lib/action_mailer/message_delivery.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "delegate"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/parameterized.rb b/actionmailer/lib/action_mailer/parameterized.rb
index 3acacc1f14..5a1adfca8f 100644
--- a/actionmailer/lib/action_mailer/parameterized.rb
+++ b/actionmailer/lib/action_mailer/parameterized.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionMailer
   # Provides the option to parameterize mailers in order to share instance variable
   # setup, processing, and common headers.
diff --git a/actionmailer/lib/action_mailer/preview.rb b/actionmailer/lib/action_mailer/preview.rb
index 4f72eca930..8053bf9eba 100644
--- a/actionmailer/lib/action_mailer/preview.rb
+++ b/actionmailer/lib/action_mailer/preview.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/descendants_tracker"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/railtie.rb b/actionmailer/lib/action_mailer/railtie.rb
index 913df8cf93..65a23e1ae7 100644
--- a/actionmailer/lib/action_mailer/railtie.rb
+++ b/actionmailer/lib/action_mailer/railtie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_job/railtie"
 require "action_mailer"
 require "rails"
diff --git a/actionmailer/lib/action_mailer/rescuable.rb b/actionmailer/lib/action_mailer/rescuable.rb
index f2eabfa057..7e8a9642b6 100644
--- a/actionmailer/lib/action_mailer/rescuable.rb
+++ b/actionmailer/lib/action_mailer/rescuable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionMailer #:nodoc:
   # Provides `rescue_from` for mailers. Wraps mailer action processing,
   # mail job processing, and mail delivery.
diff --git a/actionmailer/lib/action_mailer/test_case.rb b/actionmailer/lib/action_mailer/test_case.rb
index 9ead03a40c..1aee49d791 100644
--- a/actionmailer/lib/action_mailer/test_case.rb
+++ b/actionmailer/lib/action_mailer/test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/test_case"
 require "rails-dom-testing"
 
diff --git a/actionmailer/lib/action_mailer/test_helper.rb b/actionmailer/lib/action_mailer/test_helper.rb
index c30fb1fc18..dad260d1b6 100644
--- a/actionmailer/lib/action_mailer/test_helper.rb
+++ b/actionmailer/lib/action_mailer/test_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_job"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/version.rb b/actionmailer/lib/action_mailer/version.rb
index 8452d6370e..b0cfa19891 100644
--- a/actionmailer/lib/action_mailer/version.rb
+++ b/actionmailer/lib/action_mailer/version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActionMailer
diff --git a/actionmailer/lib/rails/generators/mailer/mailer_generator.rb b/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
index bc21b07109..335f991dec 100644
--- a/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
+++ b/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Rails
   module Generators
     class MailerGenerator < NamedBase