Git commits in Moodle 3.8.2 by David Monllaó

commit 74299cd64ba0830fb9d43285152b4dac911e2cc8
Author: David Monllaó <davidm@moodle.com>
Date:   Mon, 06 Jan 2020 12:54:37 +0800
Tag:    v3.8.2

MDL-67622 mlbackend_python: Fix f1score calculation