Fixed security expression testing user

Author: HeahDude

security.rst

@@ -964,15 +964,15 @@ You can also use expressions inside your templates:
  .. code-block:: html+jinja
 
  {% if is_granted(expression(
- '"ROLE_ADMIN" in roles or (user and user.isSuperAdmin())'
+ '"ROLE_ADMIN" in roles or (not is_anonymous() and user.isSuperAdmin())'
  )) %}
  <a href="...">Delete</a>
  {% endif %}
 
  .. code-block:: html+php
 
  <?php if ($view['security']->isGranted(new Expression(
- '"ROLE_ADMIN" in roles or (user and user.isSuperAdmin())'
+ '"ROLE_ADMIN" in roles or (not is_anonymous() and user.isSuperAdmin())'
  ))): ?>
  <a href="...">Delete</a>
  <?php endif; ?>

security/expressions.rst

@@ -18,7 +18,7 @@ accepts an :class:`Symfony\\Component\\ExpressionLanguage\\Expression` object::
  public function indexAction()
  {
  $this->denyAccessUnlessGranted(new Expression(
- '"ROLE_ADMIN" in roles or (user and user.isSuperAdmin())'
+ '"ROLE_ADMIN" in roles or (not is_anonymous() and user.isSuperAdmin())'
  ));
 
  // ...