texmath-0.12.5: test/writer/mml/msup-07.test

<<< native
[ ESuper (EIdentifier "a") (ENumber "2")
, ESymbol Rel "="
, ESuper
    (EIdentifier "a")
    (EOver False (ENumber "2") (EPhantom (EIdentifier "x")))
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <msup>
      <mi>a</mi>
      <mn>2</mn>
    </msup>
    <mo>=</mo>
    <msup>
      <mi>a</mi>
      <mover>
        <mn>2</mn>
        <mphantom>
          <mi>x</mi>
        </mphantom>
      </mover>
    </msup>
  </mrow>
</math>