Author: Jean-Michel Vedrine
MDL-33648 mod_lesson: Essay Graded message provider string is ambiguous
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0f1935fa70e51fc4ea9148612b51ef97b0033c11
http://github.com/moodle/moodle/commit/0f1935fa70e51fc4ea9148612b51ef97b0033c11
+ 2.9 en [messageprovider:graded_essay,mod_lesson]