Author: Gerard (Gerry) Caulfield
MDL-26807 Updating the withselectedusers_help string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=82b2ffaed1033172c624b6f2345425b2905255bf
http://github.com/moodle/moodle/commit/82b2ffaed1033172c624b6f2345425b2905255bf