Ticket #25730: 25730.diff

src/wp-admin/update.php

@@ -252 +252 @@
                 include(ABSPATH . 'wp-admin/admin-footer.php');
 
         } else {
+                /**
+                 * Fires if a custom action is requested.
+                 *
+                 * The dynamic part of the hook name, $action,
+                 * refers to the action derived from the GET or POST request.
+                 *
+                 * @since 2.8.0
+                 */
                 do_action('update-custom_' . $action);
         }
 }