That function controls using of editor all over moodle, you don't need to change it anyway.
Read http://docs.moodle.org/en/Messages - each user must select using of editor from settings of messaging.
That function controls using of editor all over moodle, you don't need to change it anyway.
Read http://docs.moodle.org/en/Messages - each user must select using of editor from settings of messaging.