Author: Ankit Agarwal
MDL-27786 calendar: Changing the eventname string for accessibility
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1d9a7b68f775f308312d8b594cbab53a9fd3fe6e
http://github.com/moodle/moodle/commit/1d9a7b68f775f308312d8b594cbab53a9fd3fe6e
+ 2.2 en [eventname,core_calendar]