Author: Helen Foster
MDL-25151 new help string thanks to Mark Nelson for reporting it missing
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b0363c413801d0dac2ed47a8d8f5027182fd366a
http://github.com/moodle/moodle/commit/b0363c413801d0dac2ed47a8d8f5027182fd366a
+ 2.0 en [editingrandom,qtype_random]
+ 2.0 en [random_help,qtype_random]