Git commits in Moodle 2.7.5 by Patrik Granlöv

commit 93bfaf4fa8490f33ebcde65b2e395968dbeba325
Author: Patrik Granlöv <patrik.granlov@lnu.se>
Date:   Wed, 12 Sep 2012 22:13:43 +0800
Tag:    v2.7.5

MDL-35486 outputlib: Fix typos in comments