class ActionDispatch::Routing::HtmlTableFormatter

def no_routes(*)
  @buffer << <<~MESSAGE
    <p>You don't have any routes defined!</p>
    <ul>
      <li>Please add some routes in <tt>config/routes.rb</tt>.</li>
      <li>
        For more information about routes, please see the Rails guide
        <a href="https://guides.rubyonrails.org/routing.html">Rails Routing from the Outside In</a>.
      </li>
    </ul>
  MESSAGE
end