Notification of string changes

Author: Andrew Davis
rating MDL-23908 reformated the rating role hints


http://git.moodle.org/gw?p=moodle.git;a=commit;h=52eac7506ce5b85a728ae570144461fb6d67310a
http://github.com/moodle/moodle/commit/52eac7506ce5b85a728ae570144461fb6d67310a

+ 2.0 en [rolewarning,core_rating]
- 2.0 en [canrate,core_rating]