Author: Andrew Davis
MDL-31158 grade: altered the help string for recovergradesdefault
http://git.moodle.org/gw?p=moodle.git;a=commit;h=de80da61e859899eeae90cb10db7a4eb5d810124
http://github.com/moodle/moodle/commit/de80da61e859899eeae90cb10db7a4eb5d810124
+ 2.3 en [recovergradesdefault,core_grades]
+ 2.3 en [recovergradesdefault_help,core_grades]