Author: Mihail Geshoski
MDL-58393 core: Remove firstname argument from emailconfirmation string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a84b51046a1a25d4f10922ddf2b6869df84a259a
http://github.com/moodle/moodle/commit/a84b51046a1a25d4f10922ddf2b6869df84a259a
+ 3.9 en [emailconfirmation,core]