Git commits in Moodle 3.10.7 by Leon Stringer

commit 0eb14ac1d4e71899aa27d70922b547226f23eb06
Author: Leon Stringer <leon.stringer@ntlworld.com>
Date:   Wed, 30 Jun 2021 21:59:15 +0800
Tag:    v3.10.7

MDL-72035 csvlib: Write BOM for Excel