Git commits in Moodle 2.2.4 by Sun Zhigang

commit 713e6922e0e1b0d29d5c17bc009b007f76bd7f18
Author: Sun Zhigang <sunner@gmail.com>
Date:   Tue, 22 May 2012 19:36:50 +0800
Tag:    v2.2.4

MDL-31201 wiki: fix a hardcoded string

commit 0f6113cba08fa46563764b88e5224869f75f78e0
Author: Sun Zhigang <sunner@gmail.com>
Date:   Tue, 22 May 2012 19:22:12 +0800
Tag:    v2.2.4

MDL-33035 workshop: typo in strings