Git commits in Moodle 3.9.x by Neosi

commit d772cce77a1b7510d8ec9c617e9f6dfa2e0faa15
Author: Neosi <maxlarkin@protonmail.com>
Date:   Wed, 29 Apr 2020 23:00:12 +0800
Tag:    v3.9.0-beta

MDL-68551 editor-atto: change <strike> to <del>

commit 27e44c18fe201b9fe2bb75c43c76aa5554f06809
Author: Neosi <maxlarkin@protonmail.com>
Date:   Wed, 29 Apr 2020 22:58:17 +0800
Tag:    v3.9.0-beta

MDL-68548 editor-atto: change <i> tags to <em>