5 files changed, 15 insertions, 13 deletions
diff --git a/activerecord/lib/arel/collectors/bind.rb b/activerecord/lib/arel/collectors/bind.rb
index d816aed90d..8d19e7446d 100644
--- a/activerecord/lib/arel/collectors/bind.rb
+++ b/activerecord/lib/arel/collectors/bind.rb
@@ -7,11 +7,11 @@ module Arel
         @binds = []
       end
 
-      def << str
+      def <<(str)
         self
       end
 
-      def add_bind bind
+      def add_bind(bind)
         @binds << bind
         self
       end
diff --git a/activerecord/lib/arel/collectors/composite.rb b/activerecord/lib/arel/collectors/composite.rb
index 4f6156fe27..675a819596 100644
--- a/activerecord/lib/arel/collectors/composite.rb
+++ b/activerecord/lib/arel/collectors/composite.rb
@@ -8,13 +8,13 @@ module Arel
         @right = right
       end
 
-      def << str
+      def <<(str)
         left << str
         right << str
         self
       end
 
-      def add_bind bind, &block
+      def add_bind(bind, &block)
         left.add_bind bind, &block
         right.add_bind bind, &block
         self
@@ -26,7 +26,7 @@ module Arel
 
       protected
 
-      attr_reader :left, :right
+        attr_reader :left, :right
     end
   end
 end
diff --git a/activerecord/lib/arel/collectors/plain_string.rb b/activerecord/lib/arel/collectors/plain_string.rb
index 1e8d2a2152..b98802c44a 100644
--- a/activerecord/lib/arel/collectors/plain_string.rb
+++ b/activerecord/lib/arel/collectors/plain_string.rb
@@ -1,16 +1,17 @@
 # frozen_string_literal: true
+
 module Arel
   module Collectors
     class PlainString
       def initialize
-        @str = ''.dup
+        @str = "".dup
       end
 
       def value
         @str
       end
 
-      def << str
+      def <<(str)
         @str << str
         self
       end
diff --git a/activerecord/lib/arel/collectors/sql_string.rb b/activerecord/lib/arel/collectors/sql_string.rb
index bcb941f6d4..78c9e48aab 100644
--- a/activerecord/lib/arel/collectors/sql_string.rb
+++ b/activerecord/lib/arel/collectors/sql_string.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require 'arel/collectors/plain_string'
+require "arel/collectors/plain_string"
 
 module Arel
   module Collectors
@@ -10,13 +10,13 @@ module Arel
         @bind_index = 1
       end
 
-      def add_bind bind
+      def add_bind(bind)
         self << yield(@bind_index)
         @bind_index += 1
         self
       end
 
-      def compile bvs
+      def compile(bvs)
         value
       end
     end
diff --git a/activerecord/lib/arel/collectors/substitute_binds.rb b/activerecord/lib/arel/collectors/substitute_binds.rb
index 99d2215aaa..ee6635f914 100644
--- a/activerecord/lib/arel/collectors/substitute_binds.rb
+++ b/activerecord/lib/arel/collectors/substitute_binds.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module Arel
   module Collectors
     class SubstituteBinds
@@ -7,12 +8,12 @@ module Arel
         @delegate = delegate_collector
       end
 
-      def << str
+      def <<(str)
         delegate << str
         self
       end
 
-      def add_bind bind
+      def add_bind(bind)
         self << quoter.quote(bind)
       end
 
@@ -22,7 +23,7 @@ module Arel
 
       protected
 
-      attr_reader :quoter, :delegate
+        attr_reader :quoter, :delegate
     end
   end
 end