Developer credits
Git commits in Moodle 2.8.10 by Barry Oosthuizen
commit 9486c3fe5c266792b8d7798ace9dcf08e6af332d Author: Barry Oosthuizen <barry.oosthuizen@nottingham.ac.uk> Date: Tue, 27 Oct 2015 01:22:31 +0800 Tag: v2.8.10 MDL-51913 report_stats: Make first column unique