Git commits in Moodle 2.4.6 by Jean-Philippe Gaudreau

commit 83f27b6ccadc599e82302d36fb37b3b97ab176a7
Author: Jean-Philippe Gaudreau <jp.gaudreau@umontreal.ca>
Date:   Thu, 22 Aug 2013 04:15:50 +0800
Tag:    v2.4.6

MDL-36093 grade export: Fix HTML special characters printed litteraly.