Author: Pierre Pichet
MDL-25353 Correcting lang string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a3130f2cf797c5e39624746fb38d8f955a008d66
http://github.com/moodle/moodle/commit/a3130f2cf797c5e39624746fb38d8f955a008d66
+ 2.0 en [cannotgetdsfordependent,core_question]