Developer credits
Git commits in Moodle 2.2.1 by Igor Sazonov
commit 8f64668af2fb801a1803f8f62e1b18eaabd5a4bb Author: Igor Sazonov <sovletig@yandex.ru> Date: Fri, 02 Dec 2011 00:21:07 +0800 Tag: v2.2.1 MDL-27314 quiz attempts cannot be deleted in separate groups mode.