Web Platform Tests

TODO

• Remove presentation/mspace-children.html from WebKit.
• 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/16075

WebKit tests

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

• https://github.com/web-platform-tests/wpt/pull/15301 mathml/presentation-markup/fractions/frac-color-001.html mathml/presentation-markup/fractions/frac-linethickness-001.html mathml/presentation-markup/fractions/frac-linethickness-002.html mathml/presentation-markup/fractions/frac-linethickness-003.html mathml/presentation-markup/fractions/frac-mrow-001.html mathml/presentation-markup/fractions/frac-numalign-denomalign-001.html DONE

Gecko tests