[HTTP Foundation] Improve sentence to avoid repetition

Author: MaximePinot

components/http_foundation.rst

@@ -252,8 +252,10 @@ Accessing the Session
 ~~~~~~~~~~~~~~~~~~~~~
 
 If you have a session attached to the request, you can access it via the
-:method:`Symfony\\Component\\HttpFoundation\\Request::getSession` method or the
-:method:`Symfony\\Component\\HttpFoundation\\RequestStack::getSession` method;
+:method:`Symfony\\Component\\HttpFoundation\\Request::getSession` method 
+from the :class:`Symfony\\Component\\HttpFoundation\\Request` class or the
+:method:`Symfony\\Component\\HttpFoundation\\RequestStack::getSession` method
+from the :class:`Symfony\\Component\\HttpFoundation\\RequestStack` class;
 the
 :method:`Symfony\\Component\\HttpFoundation\\Request::hasPreviousSession`
 method tells you if the request contains a session which was started in one of