Update doctrine.rst

Author: hectorprats

reference/configuration/doctrine.rst

@@ -156,9 +156,7 @@ which is the first one defined or the one configured via the
 
 Each connection is also accessible via the ``doctrine.dbal.[name]_connection``
 service where ``[name]`` is the name of the connection. Or directly in the controller with 
-getConnection method and the name of the connection.
-
-.. code-block:: php
+getConnection method and the name of the connection::
 
     $connection = $this->getDoctrine()->getConnection('customer');
     $result = $connection->fetchAll('select name from customer');