Developer credits
Git commits in Moodle 2.2.5 by Justin Filip
commit 481415635f0187fd7df0dc32f1af37cf4be63226 Author: Justin Filip <jfilip@gmail.com> Date: Sat, 03 Dec 2011 03:55:27 +0800 Tag: v2.2.5 MDL-29598 backup Check whether a grade_letters record exists before trying to insert a new record