Developer credits
Git commits in Moodle 3.8.1 by John Yao
commit b423c5ad383edc39314bab2b0a2229461a36aa8c Author: John Yao <johnyao@catalyst-au.net> Date: Mon, 16 Dec 2019 08:28:04 +0800 Tag: v3.8.1 MDL-67524 book: fixing view hidden chapter issue
commit b423c5ad383edc39314bab2b0a2229461a36aa8c Author: John Yao <johnyao@catalyst-au.net> Date: Mon, 16 Dec 2019 08:28:04 +0800 Tag: v3.8.1 MDL-67524 book: fixing view hidden chapter issue