Web Platform Tests

• Tests to write: https://github.com/mathml-refresh/mathml/issues?q=is%3Aopen+is%3Aissue+label%3A%22need+tests%22+-label%3A%22need+resolution%22

• https://github.com/web-platform-tests/wpt/pull/16075 mathml/presentation-markup/fractions/frac-created-dynamically-*.html They should use for numbers, they should use reftest-wait and modify content after page load + forcing a reflow.

• https://github.com/web-platform-tests/wpt/pull/16575 mathml/relations/css-styling/dynamic-dir-1.html Remove layout/reftests/mathml/dir-11.html from Mozilla.

• https://github.com/web-platform-tests/wpt/pull/16558 Remove mathml/presentation/inferred-mrow-baseline.html and mathml/presentation/inferred-mrow-stretchy.html from WebKit.

• https://github.com/web-platform-tests/wpt/pull/16369 mathml/relations/html5-tree/required-extensions-1.html Remove hasExtension() from Gecko ( https://bugzilla.mozilla.org/show_bug.cgi?id=1133175 ) and WebKit?

• https://github.com/web-platform-tests/wpt/pull/16050 mathml/relations/css-styling/lengths-1.html Carefully import this back to WebKit (ensure non-core is still tested).

• https://github.com/web-platform-tests/wpt/pull/15836 mathml/presentation-markup/fractions/frac-linethickness-001.html Carefully import this back to WebKit (ensure non-core is still tested).

• https://github.com/web-platform-tests/wpt/pull/15948 Remove presentation/mo-paint-lspace-rspace.html from WebKit

• https://github.com/web-platform-tests/wpt/pull/15722 Remove mathml/presentation-markup/spaces/mspace-children.html from WebKit

• https://github.com/web-platform-tests/wpt/pull/15530 Make mathml/relations/html5-tree/href-click-3.html work in WebKit (https://bugs.webkit.org/show_bug.cgi?id=187039) or Gecko (https://bugzilla.mozilla.org/show_bug.cgi?id=1530110).