diff --git a/htdocs/opensurvey/index.php b/htdocs/opensurvey/index.php
index 0a9e3483348..6ed0f2148fa 100644
--- a/htdocs/opensurvey/index.php
+++ b/htdocs/opensurvey/index.php
@@ -1,7 +1,7 @@
 <?php
 /* Copyright (C) 2013-2014 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2019      Nicolas ZABOURI      <info@inovea-conseil.com>
- * 
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or