Developer credits
Git commits in Moodle 2.5.x by Howard Miller
commit 540b8834fab874f297a18c7f55b1afe5af829d6d Author: Howard Miller <howard@e-learndesign.co.uk> Date: Tue, 05 Feb 2013 16:15:43 +0800 Tag: v2.5.0-beta MDL-37797 HTML block: add contextid to block_positions query and make it more unique.