Author: John Okely
MDL-56646 mod_assign: Improve grade fix strings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0a6282a86105fac64a26f68b8d58a644d229940b
http://github.com/moodle/moodle/commit/0a6282a86105fac64a26f68b8d58a644d229940b
+ 3.2 en [fixrescalednullgrades,mod_assign]
+ 3.2 en [fixrescalednullgradesconfirm,mod_assign]