1 files changed, 3 insertions, 3 deletions
diff --git a/railties/lib/rails/mailers_controller.rb b/railties/lib/rails/mailers_controller.rb
index 6143cf2dd9..66073899c2 100644
--- a/railties/lib/rails/mailers_controller.rb
+++ b/railties/lib/rails/mailers_controller.rb
@@ -1,4 +1,4 @@
-require 'rails/application_controller'
+require "rails/application_controller"
 
 class Rails::MailersController < Rails::ApplicationController # :nodoc:
   prepend_view_path ActionDispatch::DebugExceptions::RESCUES_TEMPLATE_PATH
@@ -14,7 +14,7 @@ class Rails::MailersController < Rails::ApplicationController # :nodoc:
   def preview
     if params[:path] == @preview.preview_name
       @page_title = "Mailer Previews for #{@preview.preview_name}"
-      render action: 'mailer'
+      render action: "mailer"
     else
       @email_action = File.basename(params[:path])
 
@@ -32,7 +32,7 @@ class Rails::MailersController < Rails::ApplicationController # :nodoc:
           end
         else
           @part = find_preferred_part(request.format, Mime[:html], Mime[:text])
-          render action: 'email', layout: false, formats: %w[html]
+          render action: "email", layout: false, formats: %w[html]
         end
       else
         raise AbstractController::ActionNotFound, "Email '#{@email_action}' not found in #{@preview.name}"