Improve link to Access Decission Manager doc

Author: ajgarlag

security/access_control.rst

@@ -158,9 +158,10 @@ options:
   (internally, an :class:`Symfony\\Component\\Security\\Core\\Exception\\AccessDeniedException`
   is thrown). If this value is an array of multiple roles, the user must have:
 
-  * at least one of them when using the default ``affirmative`` strategy
-  * all of them when using the ``unanimous`` strategy 
-    in the :ref:`Access Decision Manager <components-security-access-decision-manager>`.
+  * at least one of them when using the default ``affirmative`` strategy.
+  * all of them when using the ``unanimous`` strategy.
+  
+  For more details about different strategies, see :ref:`Access Decision Manager <components-security-access-decision-manager>`.
 
 * ``allow_if`` If the expression returns false, then access is denied;