Author: John Beedell
MDL-55911 Quiz: Accessibility, Label blanks in DD questions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=04c6fd9498a211e4789b5e334d1679084d785363
http://github.com/moodle/moodle/commit/04c6fd9498a211e4789b5e334d1679084d785363
+ 3.1 en [blank,qtype_ddimageortext]
+ 3.1 en [blank,qtype_ddwtos]