--- a/wp/wp-includes/registration-functions.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/registration-functions.php	Wed Sep 21 18:19:35 2022 +0200
@@ -6,4 +6,4 @@
  * @deprecated 2.1.0
  */
 
-_deprecated_file( basename( __FILE__ ), '2.1.0', null, __( 'This file no longer needs to be included.' ) );
+_deprecated_file( basename( __FILE__ ), '2.1.0', '', __( 'This file no longer needs to be included.' ) );