include description format when creating event.

classes/calendar_helpers.php

@@ -53,6 +53,7 @@ function attendance_create_calendar_event(&$session) {
     $caleventdata->timestart      = $session->sessdate;
     $caleventdata->timeduration   = $session->duration;
     $caleventdata->description    = $session->description;
+    $caleventdata->format         = $session->descriptionformat;
     $caleventdata->eventtype      = 'attendance';
     $caleventdata->timemodified   = time();
     $caleventdata->modulename     = 'attendance';