Fix all rubocop violations

actionview/lib/action_view/helpers/javascript_helper.rb

@@ -4,7 +4,7 @@ module ActionView
   module Helpers #:nodoc:
     module JavaScriptHelper
       JS_ESCAPE_MAP = {
-        '\\'    => '\\\\',
+        "\\"    => "\\\\",
         "</"    => '<\/',
         "\r\n"  => '\n',
         "\n"    => '\n',

activerecord/lib/active_record/connection_adapters/abstract/quoting.rb

@@ -59,7 +59,7 @@ module ActiveRecord
       # Quotes a string, escaping any ' (single quote) and \ (backslash)
       # characters.
       def quote_string(s)
-        s.gsub('\\', '\&\&').gsub("'", "''") # ' (for ruby-mode)
+        s.gsub("\\", '\&\&').gsub("'", "''") # ' (for ruby-mode)
       end
 
       # Quotes the column name. Defaults to no quoting.

activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb

@@ -51,11 +51,11 @@ module ActiveRecord
               end
 
               key.gsub!('\"', '"')
-              key.gsub!('\\\\', '\\')
+              key.gsub!("\\\\", "\\")
 
               if value
                 value.gsub!('\"', '"')
-                value.gsub!('\\\\', '\\')
+                value.gsub!("\\\\", "\\")
               end
 
               hash[key] = value

activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb

@@ -88,7 +88,7 @@ module ActiveRecord
               if value.start_with?('"') && value.end_with?('"')
                 unquoted_value = value[1..-2]
                 unquoted_value.gsub!('""', '"')
-                unquoted_value.gsub!('\\\\', '\\')
+                unquoted_value.gsub!("\\\\", "\\")
                 unquoted_value
               else
                 value