Update security.rst

Co-authored-by: Robin Chalas <chalasr@users.noreply.github.com>

Author: johnkrovitch

security.rst

@@ -689,9 +689,8 @@ class ExampleController
 }
 
 The previous example only works if you have only one authenticator configured on the current firewall so if you have more than one authenticator, you need to specify which authenticator should be used.
-If the firewall is not explicitly passed, the method will
-be retrieved from the request. If the current request is not under any firewall an
-`Symfony\\Component\\Security\\Core\\Exception\\LogicException` exception will be thrown.
+If no firewall is explicitly passed to the method, it will use the firewall from the current request. 
+And If the current request is not under any firewall, a ``\LogicException`` will be thrown.
 
 You can also pass the authenticator on which the user will
 be authenticated against. For built-in authenticators, you can pass an authenticator name like ``form_login``,