Merge branch 'luca-branch' of https://github.com/ilyatregubov/moodle

question/format/aiken/format.php

@@ -61,6 +61,10 @@ class qformat_aiken extends qformat_default {
         return true;
     }
 
+    public function validate_file(stored_file $file): string {
+        return $this->validate_is_utf8_file($file);
+    }
+
     public function readquestions($lines) {
         $questions = array();
         $question = null;