module ActionController::Helpers::ClassMethods

* array - A normalized list of modules for the list of helpers provided.
==== Returns

* args - A list of helpers
==== Parameters

all helpers in helpers_path.
Override modules_for_helpers to accept +:all+ as argument, which loads

def modules_for_helpers(args)
  args += all_application_helpers if args.delete(:all)
  super(args)
end