def append_and_render
      loaded_list = SubscriptionListParser.new(list: destination)
      case File.extname destination
      when '.xml' || '.opml'
        render_opml(loaded_list)
      when '.json'
        render_json(loaded_list)
      when '.txt'
        render_txt(loaded_list)
      end
    end
def append_and_render
      loaded_list = SubscriptionListParser.new(list: destination)
      case File.extname destination
      when '.xml' || '.opml'
        render_opml(loaded_list)
      when '.json'
        render_json(loaded_list)
      when '.txt'
        render_txt(loaded_list)
      end
    end
def append_and_render loaded_list = SubscriptionListParser . new ( list : destination ) case File . extname destination when '.xml' || '.opml' render_opml ( loaded_list ) when '.json' render_json ( loaded_list ) when '.txt' render_txt ( loaded_list ) end end
Returns the rendered string for the correct file type.

 @return [String]
Returns the rendered string for the correct file type .