Change the default template handler from `ERB` to `Raw`.

Files without a template handler in their extension will be rended
using the raw handler instead of ERB.

actionview/CHANGELOG.md

@@ -1,3 +1,10 @@
+*   Change the default template handler from `ERB` to `Raw`.
+
+    Files without a template handler in their extension will be rended using the raw
+    handler instead of ERB.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `AbstractController::Base::parent_prefixes`.
 
     *Rafael Mendonça França*

actionview/lib/action_view/template/handlers.rb

@@ -7,9 +7,9 @@ module ActionView #:nodoc:
       autoload :Raw, 'action_view/template/handlers/raw'
 
       def self.extended(base)
-        base.register_default_template_handler :erb, ERB.new
+        base.register_default_template_handler :raw, Raw.new
+        base.register_template_handler :erb, ERB.new
         base.register_template_handler :builder, Builder.new
-        base.register_template_handler :raw, Raw.new
         base.register_template_handler :ruby, :source.to_proc
       end
 

actionview/lib/action_view/template/resolver.rb

@@ -251,12 +251,6 @@ module ActionView
       pieces.shift
 
       extension = pieces.pop
-      unless extension
-        ActiveSupport::Deprecation.warn(<<-MSG.squish)
-          The file #{path} did not specify a template handler. The default is
-          currently ERB, but will change to RAW in the future.
-        MSG
-      end
 
       handler = Template.handler_for_extension(extension)
       format, variant = pieces.last.split(EXTENSIONS[:variants], 2) if pieces.last