Merge branch '6.4' into 7.0

* 6.4:
  [DependencyInjection] Mention autoconfiguration through attributes
  [Panther] Add component documentation

Author: OskarStark

.doctor-rst.yaml

@@ -111,4 +111,4 @@ whitelist:
         - '.. versionadded:: 3.6' # MonologBundle
         - '.. versionadded:: 3.8' # MonologBundle
         - '.. _`a feature to test applications using Mercure`: https://github.com/symfony/panther#creating-isolated-browsers-to-test-apps-using-mercure-or-websocket'
-        - '..  End to End Tests (E2E)'
+        - 'End to End Tests (E2E)'

service_container.rst

@@ -1027,6 +1027,17 @@ you don't need to do *anything*: the service will be automatically loaded. Then,
 implements ``Twig\Extension\ExtensionInterface``. And thanks to ``autowire``, you can even add
 constructor arguments without any configuration.
 
+Autconfiguration also works with attributes. Some attributes like
+:class:`Symfony\\Component\\Messenger\\Attribute\\AsMessageHandler`,
+:class:`Symfony\\Component\\EventDispatcher\\Attribute\\AsEventListener` and
+:class:`Symfony\\Component\\Console\\Attribute\\AsCommand` are registered
+for autoconfiguration. Any class using these attributes will have tags applied
+to them.
+
+.. versionadded:: 5.3
+
+    Autoconfiguration through attributes was introduced in Symfony 5.3.
+
 Linting Service Definitions
 ---------------------------
 

testing.rst

@@ -1128,12 +1128,15 @@ HttpClient Assertions
     By default it will check on the HttpClient, but you can also pass a specific
     HttpClient ID.
 
-.. TODO
-..  End to End Tests (E2E)
-..  ----------------------
-..  * panther
-..  * testing javascript
-..  * UX or form collections as example?
+End to End Tests (E2E)
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you need to test the application as a whole, including the JavaScript
+code, you can use a real browser instead of the test client. This is
+called an end-to-end test and it's a great way to test the application.
+
+This can be achieved thanks to the Panther component. You can learn more
+about it in :doc:`the dedicated page </testing/end_to_end>`.
 
 Learn more
 ----------