texmath-0.12.5: test/writer/mml/msub-11.test

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