Bug
1847034 - Export reftests for MathML embellished operators to WPT. r=emilio
The tests exported in this patch use complex embellished operators and
verify whether or not the operator stretches. To avoid relying on
systems fonts and make the visual rendering more reliable, we use the
Ahem font for text as well as operators.woff for stretchy operators.
stretchy-mover-2a.html is currently failing so we preserve this
annotation. Some unrelated alignment issue were happening with
stretchy-mover-1a/b, which are worked around by wrapping the <math>
tag in a container div.
Differential Revision: https://phabricator.services.mozilla.com/
D185308