Convert array + phpDoc

Thanks for https://github.com/thomasbachem/php-short-array-syntax-converter

src/Wallabag/CoreBundle/Subscriber/TablePrefixSubscriber.php

@@ -27,7 +27,7 @@ class TablePrefixSubscriber implements EventSubscriber
 
     public function getSubscribedEvents()
     {
-        return array('loadClassMetadata');
+        return ['loadClassMetadata'];
     }
 
     public function loadClassMetadata(LoadClassMetadataEventArgs $args)