Author: Frederic Massart
MDL-40055 mod_assign: Replace add_to_log 'submission statement accepted'
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b1e52860ea273bbbb9c6c765f654cd8d92a2ac9b
http://github.com/moodle/moodle/commit/b1e52860ea273bbbb9c6c765f654cd8d92a2ac9b
+ 2.6 en [event_statement_accepted,mod_assign]