minor #10017 Use AbstractController in the main controller article (javiereguiluz)

This PR was squashed before being merged into the 4.1 branch (closes #10017).

Discussion
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Use AbstractController in the main controller article

This solves #9991 differently.

Commits
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c341381 Use AbstractController in the main controller article

Author: javiereguiluz

controller.rst

@@ -86,14 +86,14 @@ For more information on routing, see :doc:`/routing`.
    single: Controller; Base controller class
 
 .. _the-base-controller-class-services:
+.. _the-base-controller-classes-services:
 
-The Base Controller Classes & Services
---------------------------------------
+The Base Controller Class & Services
+------------------------------------
 
-To make life nicer, Symfony comes with two optional base
-:class:`Symfony\\Bundle\\FrameworkBundle\\Controller\\Controller` and
+To make life nicer, Symfony comes with an optional base controller class called
 :class:`Symfony\\Bundle\\FrameworkBundle\\Controller\\AbstractController`.
-You can extend either to get access to some `helper methods`_.
+You can extend it to get access to some `helper methods`_.
 
 Add the ``use`` statement atop your controller class and then modify
 ``LuckyController`` to extend it:
@@ -103,35 +103,24 @@ Add the ``use`` statement atop your controller class and then modify
     // src/Controller/LuckyController.php
     namespace App\Controller;
 
-    + use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+    + use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 
     - class LuckyController
-    + class LuckyController extends Controller
+    + class LuckyController extends AbstractController
     {
         // ...
     }
 
 That's it! You now have access to methods like :ref:`$this->render() <controller-rendering-templates>`
 and many others that you'll learn about next.
 
-.. _controller-abstract-versus-controller:
-
-.. tip::
-
-    What's the difference between ``Controller`` or ``AbstractController``? Not much:
-    both are identical, except that ``AbstractController`` is more restrictive: it
-    does not allow you to access services directly via ``$this->get()`` or
-    ``$this->container->get()``. This forces you to write more robust code to access
-    services. But if you *do* need direct access to the container, using ``Controller``
-    is fine.
-
 .. index::
    single: Controller; Redirecting
 
 Generating URLs
 ~~~~~~~~~~~~~~~
 
-The :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\Controller::generateUrl`
+The :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\ControllerTrait::generateUrl`
 method is just a helper method that generates the URL for a given route::
 
     $url = $this->generateUrl('app_lucky_number', array('max' => 10));
@@ -650,7 +639,7 @@ contains the logic for that page. In Symfony, this is called a controller,
 and it's a PHP function where you can do anything in order to return the
 final ``Response`` object that will be returned to the user.
 
-To make life easier, you'll probably extend the base ``Controller`` class because
+To make life easier, you'll probably extend the base ``AbstractController`` class because
 this gives access to shortcut methods (like ``render()`` and ``redirectToRoute()``).
 
 In other articles, you'll learn how to use specific services from inside your controller

controller/service.rst

@@ -81,9 +81,9 @@ without the method (``App\Controller\HelloController`` for example).
 Alternatives to base Controller Methods
 ---------------------------------------
 
-When using a controller defined as a service, you can still extend any of the
-:ref:`normal base controller <the-base-controller-class-services>` classes and
-use their shortcuts. But, you don't need to! You can choose to extend *nothing*,
+When using a controller defined as a service, you can still extend the
+:ref:`AbstractController base controller <the-base-controller-class-services>`
+and use its shortcuts. But, you don't need to! You can choose to extend *nothing*,
 and use dependency injection to access different services.
 
 The base `Controller class source code`_ is a great way to see how to accomplish

service_container/3.3-di-changes.rst

@@ -326,7 +326,7 @@ The third big change is that, in a new Symfony 3.3 project, your controllers are
         $this->registerClasses($definition, 'App\\Controller\\', '../src/Controller/*');
 
 But, you might not even notice this. First, your controllers *can* still extend
-the same base ``Controller`` class or a new :ref:`AbstractController <controller-abstract-versus-controller>`.
+the same base controller class (``AbstractController``).
 This means you have access to all of the same shortcuts as before. Additionally,
 the ``@Route`` annotation and ``_controller`` syntax (e.g. ``App:Default:homepage``)
 used in routing will automatically use your controller as a service (as long as its