Git commits in Moodle 2.3.1 by Sun Zhigang

commit 8b3d60557c062bb332058abc8765ddd8ebfa9b98
Author: Sun Zhigang <sunner@gmail.com>
Date:   Tue, 22 May 2012 19:36:50 +0800
Tag:    v2.3.1

MDL-31201 wiki: fix a hardcoded string