Updated comment to Rails 4

railties/lib/rails/generators/rails/plugin_new/templates/bin/rails.tt

-# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
+# This command will automatically be run when you run "rails" with Rails 4 gems installed from the root of your application.
 
 ENGINE_ROOT = File.expand_path('../..', __FILE__)
 ENGINE_PATH = File.expand_path('../../lib/<%= name -%>/engine', __FILE__)