Fix some docblocks.

Author: derrabus

Command/AbstractConfigCommand.php

@@ -14,6 +14,7 @@
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Console\Exception\LogicException;
 use Symfony\Component\Console\Helper\Table;
+use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\StyleInterface;
 use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 
@@ -26,6 +27,9 @@
  */
 abstract class AbstractConfigCommand extends ContainerDebugCommand
 {
+    /**
+     * @param OutputInterface|StyleInterface $output
+     */
     protected function listBundles($output)
     {
         $title = 'Available registered bundles with their extension alias if available';