Small improvement

Author: noniagriconomie

security/expressions.rst

@@ -12,8 +12,10 @@ Security: Complex Access Controls with Expressions
 In addition to a role like ``ROLE_ADMIN``, the ``isGranted()`` method also
 accepts an :class:`Symfony\\Component\\ExpressionLanguage\\Expression` object::
 
+    // src/Controller/MyController.php
     use Symfony\Component\ExpressionLanguage\Expression;
-    // ...
+
+    // ... your controller code
 
     public function index(): Response
     {