Author: Luca Bösch
MDL-71118 core: Add grade (verb) string.
AMOS BEGIN
CPY [grade,core],[gradenoun,core]
CPY [grade,core],[gradeverb,core]
AMOS END
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c5446c9cc72cc5c4ec87b50484069dab4e250b5f
http://github.com/moodle/moodle/commit/c5446c9cc72cc5c4ec87b50484069dab4e250b5f
+ 3.11 en [gradenoun,core]
+ 3.11 en [gradeverb,core]