texmath-0.13.1.2: test/writer/mml/stackrel.test

<<< native
[ ESub (EIdentifier "u") (EIdentifier "n")
, EOver False (ESymbol Rel "\8594") (EIdentifier "w")
, EIdentifier "u"
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <msub>
      <mi>u</mi>
      <mi>n</mi>
    </msub>
    <mover>
      <mo>→</mo>
      <mi>w</mi>
    </mover>
    <mi>u</mi>
  </mrow>
</math>