Author: Sam Hemelryk
MDL-42258 course management: improved role assignments string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9860e5710432b0f2a1f694ed41d7b946dc825542
http://github.com/moodle/moodle/commit/9860e5710432b0f2a1f694ed41d7b946dc825542
+ 2.6 en [assignedrolecount,core]