texmath-0.12.5: test/writer/mml/15.test

<<< native
[ EFraction NormalFrac (EIdentifier "a") (ENumber "2") ]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mfrac>
    <mi>a</mi>
    <mn>2</mn>
  </mfrac>
</math>