Author: Tim Hunt
MDL-49368 qtypes match & multichice: cope with editing after attempt
Teachers should not radically edit a question after it has been
attempted. However, if they do, we should handle it gracefully, rather
than triggering PHP errors.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=609e3cfc0bec0f00ee4f392476ea2153410916ff
http://github.com/moodle/moodle/commit/609e3cfc0bec0f00ee4f392476ea2153410916ff
+ 2.9 en [deletedchoice,qtype_match]
+ 2.9 en [deletedsubquestion,qtype_match]
+ 2.9 en [deletedchoice,qtype_multichoice]