diff --git a/question/engine/upgrade/upgradelib.php b/question/engine/upgrade/upgradelib.php
index cfd9875852e..5ba8e1c93fa 100644
--- a/question/engine/upgrade/upgradelib.php
+++ b/question/engine/upgrade/upgradelib.php
@@ -571,7 +571,7 @@ abstract class question_qtype_attempt_updater {
     public function is_blank_answer($state) {
         return $state->answer == '';
     }
-    
+
     public abstract function right_answer();
     public abstract function response_summary($state);
     public abstract function was_answered($state);
diff --git a/question/type/multichoice/db/upgradelib.php b/question/type/multichoice/db/upgradelib.php
index 99b5640f676..dd004a551ae 100644
--- a/question/type/multichoice/db/upgradelib.php
+++ b/question/type/multichoice/db/upgradelib.php
@@ -42,10 +42,10 @@ class qtype_multichoice_qe2_attempt_updater extends question_qtype_attempt_updat
     public function is_blank_answer($state) {
         // blank multichoice answers are not empty strings, they rather end in a colon
         $a = $state->answer;
-        $empty = (substr($a, strlen($a) - 1) == ':'); 
+        $empty = (substr($a, strlen($a) - 1) == ':');
         return $empty;
     }
-    
+
     public function right_answer() {
         if ($this->question->options->single) {
             foreach ($this->question->options->answers as $ans) {