Author: Mark Nelson
MDL-40908 core_tag: replaced 'add' add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cfa2c6e1989b664636de362767e4b33b24f48703
http://github.com/moodle/moodle/commit/cfa2c6e1989b664636de362767e4b33b24f48703
+ 2.7 en [eventitemtagged,core_tag]