Merge branch '4.3' into 4.4

* 4.3:
  Fixed heading levels
  Updated the explanation about Symfony server dependencies
  [Messenger] Fix hidden section title
  Fixed the link to the ErrorRenderer component page

Author: javiereguiluz

contributing/code/core_team.rst

@@ -92,7 +92,7 @@ Active Core Members
 
   * **Samuel Rozé** (`sroze`_) can merge into the Messenger_ component.
 
-  * **Yonel Ceruto** (`yceruto`_) can merge into the ErrorRenderer,
+  * **Yonel Ceruto** (`yceruto`_) can merge into the ErrorRenderer_,
     OptionsResolver_, and Form_ components and TwigBundle_.
 
 * **Deciders Team** (``@symfony/deciders`` on GitHub):

messenger/handler_results.rst

@@ -2,7 +2,7 @@
     single: Messenger; Getting results / Working with command & query buses
 
 Getting Results from your Handler
----------------------------------
+=================================
 
 When a message is handled, the :class:`Symfony\\Component\\Messenger\\Middleware\\HandleMessageMiddleware`
 adds a :class:`Symfony\\Component\\Messenger\\Stamp\\HandledStamp` for each object that handled the message.

setup/symfony_server.rst

@@ -14,9 +14,9 @@ PHP application and even with HTML/SPA (single page applications).
 Installation
 ------------
 
-The Symfony server is distributed as a free installable binary, without any
-dependency, and has support for Linux, macOS and Windows. Go to `symfony.com/download`_
-and follow the instructions for your operating system.
+The Symfony server is distributed as a free installable binary and has support
+for Linux, macOS and Windows. Go to `symfony.com/download`_ and follow the
+instructions for your operating system.
 
 .. note::