Developer credits
Git commits in Moodle 3.9.x by Zig Tan
commit 13954424748a4e7c8f3240f2da6e74c531c10eae Author: Zig Tan <zig@moodle.com> Date: Thu, 11 Jan 2018 13:44:42 +0800 Tag: v3.9.0-beta MDL-54554 files: Improve unoconv error logging & sanity checks