Developer credits
Git commits in Moodle 2.8.9 by Ferenc Lengyel
commit bfd6727b426380eec8e1277e60297f2ea0473a22 Author: Ferenc Lengyel <lengyelke@gmail.com> Date: Mon, 14 Sep 2015 20:23:51 +0800 Tag: v2.8.9 MDL-51402 quiz: notification emails should respect grouping