Author: Mark Nelson
MDL-41101 mod_assign: replaced 'save grading feedback' add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b7656ff069a965ac39fd58c404fe68c5af5a3a95
http://github.com/moodle/moodle/commit/b7656ff069a965ac39fd58c404fe68c5af5a3a95
+ 2.7 en [eventfeedbackupdated,mod_assign]