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+# Tests for the MathML Core specification
+
+This directory contains tests for the
+[MathML Core specification](https://w3c.github.io/mathml-core/).
+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.