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third_party/WebKit/LayoutTests/imported/wpt/mathml/README.md

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+# MathML: Tests for the MathML in HTML5 implementation note
+
+This directory contains tests for the
+[MathML in HTML5 implementation note](http://www.mathml-association.org/MathMLinHTML5/)
+which is itself based on the
+[HTML5 W3C recommendation](https://www.w3.org/TR/html5/),
+on the [MathML3 W3C recommendation](https://www.w3.org/TR/MathML3/)
+and on the
+[Open Font Format 3](http://www.iso.org/iso/home/store/catalogue_ics/catalogue_detail_ics.htm?csnumber=66391) standard.
+
+Many of the tests verify OpenType features and require specific Web fonts for
+that purpose. WOFF fonts are generated by scripts in the `tools/` folder using
+the Python API of
+[fontforge](https://github.com/fontforge/fontforge/). A recent enough version
+of FontForge is necessary so that it includes fixes for
+[WOFF checkSumAdjustment](https://github.com/fontforge/fontforge/issues/926),
+[USE_TYPO_METRICS flag](https://github.com/fontforge/fontforge/pull/2274) and
+for other various bugs.