Merge branch '4.4'

* 4.4:
  fix linelength. refs #12617
  Update best_practices.rst

Author: OskarStark

best_practices.rst

@@ -234,8 +234,9 @@ the fact that a controller should always return a ``Response`` object.
 Use Dependency Injection to Get Services
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-If you extend the base ``AbstractController``, you can't access services
-directly from the container via ``$this->container->get()`` or ``$this->get()``.
+If you extend the base ``AbstractController``, you can only access to the most
+common services (e.g ``twig``, ``router``, ``doctrine``, etc.), directly from the
+container via ``$this->container->get()`` or ``$this->get()``.
 Instead, you must use dependency injection to fetch services by
 :ref:`type-hinting action method arguments <controller-accessing-services>` or
 constructor arguments.