Git commits in Moodle 3.10.5 by Jonathon Fowler

commit 56a1e134f22ccf824004cd729a1c2d7741817a27
Author: Jonathon Fowler <fowlerj@usq.edu.au>
Date:   Wed, 05 May 2021 14:35:52 +0800
Tag:    v3.10.5

MDL-60431 qtype_calculated: handle NAN and INF calculation outcomes