Merge branch '5.2' into 5.x

* 5.2:
  Adding typehint
  Corrected minor grammar mistake in the routing docs

Author: javiereguiluz

routing.rst

@@ -2216,8 +2216,8 @@ Stateless Routes
     The ``stateless`` option was introduced in Symfony 5.1.
 
 Sometimes, when an HTTP response should be cached, it is important to ensure
-that can happen. However, whenever session is started during a request, Symfony
-turns the response into a private non-cacheable response.
+that can happen. However, whenever a session is started during a request,
+Symfony turns the response into a private non-cacheable response.
 
 For details, see :doc:`/http_cache`.
 

security/guard_authentication.rst

@@ -187,7 +187,7 @@ This requires you to implement several methods::
             return true;
         }
 
-        public function onAuthenticationSuccess(Request $request, TokenInterface $token, $providerKey)
+        public function onAuthenticationSuccess(Request $request, TokenInterface $token, string $providerKey)
         {
             // on success, let the request continue
             return null;