Developer credits
Git commits in Moodle 2.6.3 by Tony Levi
commit 08ab12bd48e23f8f26648b9745cc949c2da015cb Author: Tony Levi <tony.levi@netspot.com.au> Date: Wed, 02 Apr 2014 11:30:19 +0800 Tag: v2.6.3 MDL-44908: Fix upgrade_grade_item_fix_sortorder performance