https://github.com/executablebooks/MyST-NB/pull/693/changes#diff-ffa0cf053e88b1dc95edd70ebd217cc8171d81a88002e3ea4ff444c0abc355d2L220
https://github.com/executablebooks/MyST-NB/pull/693/changes#diff-ffa0cf053e88b1dc95edd70ebd217cc8171d81a88002e3ea4ff444c0abc355d2L220