--- a/wp/wp-includes/rewrite.php	Fri Sep 05 18:40:08 2025 +0200
+++ b/wp/wp-includes/rewrite.php	Fri Sep 05 18:52:52 2025 +0200
@@ -244,7 +244,7 @@
  *
  * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
  *
- * @param string   $feedname Feed name.
+ * @param string   $feedname Feed name. Should not start with '_'.
  * @param callable $callback Callback to run on feed display.
  * @return string Feed action name.
  */