Update mercure.rst

OskarStark · dunglas · web-flow · commit ace24c090b9a · 2019-03-07T00:09:04.000+01:00
Co-Authored-By: dunglas &lt;dunglas@gmail.com&gt;
diff --git a/mercure.rst b/mercure.rst
@@ -334,7 +334,6 @@ Authorization
 Mercure also allows to dispatch updates only to authorized clients.
 To do so, set the list of **targets** allowed to receive the update
 as the third parameter of the ``Update`` constructor::
-
 .. code-block:: php
 
     // src/Controller/Publish.php
