Update service_container/factories.rst

Author: OskarStark

service_container/factories.rst

@@ -136,10 +136,7 @@ called to create its object. In this case we don't need a dedicated factory clas
             # ...
 
             App\Email\NewsletterManager:
-                # the first argument is the class and the second argument is the static method
-                # note that we omit the '@' prefix when using the class name as the first argument!
-                # you can also remove the class name entirely and use 'null' instead
-                factory: ['App\Email\NewsletterManager', 'create']
+                factory: [null, 'create']
                 arguments:
                     $sender: 'fabien@symfony.com'