Minor - Replaced tabspaces with blankspaces

main/dropbox/dropbox_functions.inc.php

@@ -1000,7 +1000,7 @@ function user_can_download_file($id, $user_id) {
 }
 
 // we now check if the other users have not delete this document yet. If this is the case then it is useless to see the
-	// add feedback since the other users will never get to see the feedback.
+// add feedback since the other users will never get to see the feedback.
 function check_if_file_exist($id) {
     $dropbox_cnf = getDropboxConf();
     $id = intval($id);