routes.rb should teach how to use concerns

Author: ch1ago

railties/lib/rails/generators/rails/app/templates/config/routes.rb

@@ -39,6 +39,13 @@
   #       get 'recent', on: :collection
   #     end
   #   end
+  
+  # Example resource route with concerns:
+  #   concern :toggleable do
+  #     post 'toggle'
+  #   end
+  #   resources :posts, concerns: :toggleable
+  #   resources :photos, concerns: :toggleable
 
   # Example resource route within a namespace:
   #   namespace :admin do