Update mercure.rst

Co-Authored-By: dunglas <[email protected]>

Author: OskarStark

mercure.rst

@@ -280,7 +280,6 @@ in a ``Link`` HTTP header.
 You can create ``Link`` headers with the :doc:`WebLink Component </web_link>`,
 by using the ``AbstractController::addLink`` helper method::
 
-
     // src/Controller/DiscoverController.php
     namespace App\Controller;