Git commits in Moodle 3.7.x by Jean-Michel Vedrine

commit 48aad79a6344457dcec67988e86c1d17dc4a669e
Author: Jean-Michel Vedrine <vedrine@vedrine.org>
Date:   Tue, 19 Feb 2019 00:48:32 +0800
Tag:    v3.7.0-beta

MDL-63905 qtype_multianswer: validate imported questions

commit d1e24c12757b8e2ba8a9101ba9ac11855eac644b
Author: Jean-Michel Vedrine <vedrine@vedrine.org>
Date:   Fri, 10 Aug 2018 00:31:36 +0800
Tag:    v3.7.0-beta

MDL-62974 lesson: Suppress HTML font tags

commit 5dd1cf33abbf44a753955e58b8b235421e17efef
Author: Jean-Michel Vedrine <vedrine@vedrine.org>
Date:   Thu, 09 Oct 2014 23:44:11 +0800
Tag:    v3.7.0-beta

MDL-21904 qformat_aiken: add export feature.