Ticket #39593: 39593.diff

src/wp-admin/includes/class-automatic-upgrader-skin.php

@@ -59 +59 @@
         }
 
         /**
-         * @param string|array|WP_Error $data
+         * Displays success or error message on the update process.
+         *
+         * @param string $data Upgrade function that needs feedback to show if success or fail.
          */
         public function feedback( $data ) {
                 if ( is_wp_error( $data ) ) {