Ends a group listing definition. Group definition automatically end when class or module blocks are closed, and defining a new group overrides the last group definition, but occasionally you need to end the current group to return to the default listing. Use {tag:!group} to begin a group listing.

@example

  class Controller
    # @!group Callbacks

    def before_filter; end
    def after_filter; end

    # @!endgroup

    def index; end
  end

@see tag:!group @since 0.6.0