Author: Mark Nelson
MDL-40063 mod_quiz: replaced ‘manualgrade’ add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e8365f27e5f547f11273e4d428e14248308f4f4f
http://github.com/moodle/moodle/commit/e8365f27e5f547f11273e4d428e14248308f4f4f
+ 2.7 en [eventquestionmanuallygraded,mod_quiz]