Merge branch '4.3' into 4.4

* 4.3:
  cs fix
  Partially Revert "Remove trailing space in all markdown files"
  [Intl] Explicit check
  Fix getMaxFilesize() returning zero
  [DI] fix docblocks in Container*
  Fixed markdown file
  [TwigBridge] Replaced plain doc block copies with inheritdoc.
  [DomCrawler] Fixed CHANGELOG markup
  [Intl] Cleanup unused language aliases entry

Author: nicolas-grekas

ContainerBuilder.php

@@ -1074,7 +1074,7 @@ public function findDefinition($id)
     /**
      * Creates a service for a service definition.
      *
-     * @return object The service described by the service definition
+     * @return mixed The service described by the service definition
      *
      * @throws RuntimeException         When the factory definition is incomplete
      * @throws RuntimeException         When the service is a synthetic service
@@ -1639,7 +1639,7 @@ private function callMethod($service, array $call, array &$inlineServices)
     /**
      * Shares a given service in the container.
      *
-     * @param object $service
+     * @param mixed $service
      */
     private function shareService(Definition $definition, $service, ?string $id, array &$inlineServices)
     {

ContainerInterface.php

@@ -33,8 +33,8 @@ interface ContainerInterface extends PsrContainerInterface
     /**
      * Sets a service.
      *
-     * @param string $id      The service identifier
-     * @param object $service The service instance
+     * @param string      $id      The service identifier
+     * @param object|null $service The service instance
      */
     public function set($id, $service);
 
@@ -44,7 +44,7 @@ public function set($id, $service);
      * @param string $id              The service identifier
      * @param int    $invalidBehavior The behavior when the service does not exist
      *
-     * @return object The associated service
+     * @return object|null The associated service
      *
      * @throws ServiceCircularReferenceException When a circular reference is detected
      * @throws ServiceNotFoundException          When the service is not defined