Author: Rajesh Taneja
MDL-40058 mod_wiki: Replaced add_to_log for history viewed with event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d1d555c9558f216b32b4425cd3e052af239620bd
http://github.com/moodle/moodle/commit/d1d555c9558f216b32b4425cd3e052af239620bd
+ 2.7 en [eventhistoryviewed,mod_wiki]