Developer credits
Git commits in Moodle 3.1.0 by Gareth J Barnard
commit c44ec0d6aa96be026a4af9fdfd8a20e3b888c938 Author: Gareth J Barnard <gjbarnard@gmail.com> Date: Wed, 13 Apr 2016 19:56:13 +0800 Tag: v3.1.0-beta MDL-53033 themes: Invalid attribute values for div.c1.btn.
commit 6eaa3230ba104019357b203a36ba0a00e406f112 Author: Gareth J Barnard <gjbarnard@gmail.com> Date: Thu, 11 Feb 2016 01:40:38 +0800 Tag: v3.1.0-beta MDL-53029 mod_book: Hidden chapter has markup in alt and title attrs.