$shortname = format_string($course->shortname, true, array('context' => get_context_instance(CONTEXT_COURSE, $course->id)));
- $postsubject = "$shortname: ".format_string($post->subject,true);
+ $postsubject = html_to_text("$shortname: ".format_string($post->subject, true));
$posttext = forum_make_mail_text($course, $cm, $forum, $discussion, $post, $userfrom, $userto);
$posthtml = forum_make_mail_html($course, $cm, $forum, $discussion, $post, $userfrom, $userto);