MDL-11992: adding course tagging patch, by John Beedell. This feature is not

active by default at this time. Related help files are not included in this
commit, as they are being revised (see issue 15385) and will be sent in soon.

tag/edit.php

@@ -90,7 +90,7 @@ if ($tagnew = $tagform->get_data()) {
         if (has_capability('moodle/tag:manage', $systemcontext)) {
             // rename tag
             if(!tag_rename($tag->id, $tagnew->rawname)) {
-                error('Error updating tag record');
+                print_error('errorupdatingrecord', 'tag');
             }
         }