Developer credits
Git commits in Moodle 2.2.x by ISHIKAWA Takayuki
commit 81bf2a1a1d308ae49062a0c5f821596273996566 Author: ISHIKAWA Takayuki <rechka_osaka@yahoo.co.jp> Date: Thu, 14 Jun 2012 20:29:33 +0800 Tag: v2.2.4 MDL-33757 gradebook: Adding support to sort userlist by email address