Merge branch '6.3' into 6.4

* 6.3:
  Updated code example
  Update performance.rst to use $container->getParameterBag()
  [Question helper] Add more accuracy on multiple choices answers

Author: javiereguiluz

components/console/helpers/questionhelper.rst

@@ -180,7 +180,9 @@ this use :method:`Symfony\\Component\\Console\\Question\\ChoiceQuestion::setMult
     }
 
 Now, when the user enters ``1,2``, the result will be:
-``You have just selected: blue, yellow``.
+``You have just selected: blue, yellow``. The user can also enter strings
+(e.g. ``blue,yellow``) and even mix strings and the index of the choices
+(e.g. ``blue,2``).
 
 If the user does not enter anything, the result will be:
 ``You have just selected: red, blue``.

performance.rst

@@ -79,9 +79,11 @@ container into a single file, which could improve performance when using
     .. code-block:: php
 
         // config/services.php
+        namespace Symfony\Component\DependencyInjection\Loader\Configurator;
 
-        // ...
-        $container->parameters()->set('.container.dumper.inline_factories', true);
+        return function(ContainerConfigurator $container): void {
+            $container->parameters()->set('.container.dumper.inline_factories', true);
+        };
 
 .. _performance-use-opcache: