Merge 4b6c248296 into 6bb9a0b33d

src/Control/Controller.php

@@ -627,8 +627,9 @@ class Controller extends RequestHandler implements TemplateGlobalProvider
      * Caution: All parameters are expected to be URI-encoded already.
      *
      * @param string|array $arg One or more link segments, or list of link segments as an array
+     * @return string
      */
-    public static function join_links($arg = null): string
+    public static function join_links($arg = null)
     {
         if (func_num_args() === 1 && is_array($arg)) {
             $args = $arg;