Ticket #25723: 25723.update.php.patch

update.php

@@ -252 +252 @@
                 include(ABSPATH . 'wp-admin/admin-footer.php');
 
         } else {
+                /**
+                 * Fires a custom update function.
+                 *
+                 * The dynamic portion of the hook name, $action, refers to the action
+                 * that was provided in the request for the wp-admin/update.php. Can
+                 * be used to provide custom update functionality for themes and
+                 * plugins.
+                 *
+                 * @since 2.8.0
+                 */
                 do_action('update-custom_' . $action);
         }
 }