texmath-0.12.5: test/writer/mml/msub-04.test

<<< native
[ ESub (EIdentifier "L") (ESub (EIdentifier "X") (EIdentifier "h"))
, ESymbol Rel "="
, ESub
    (EIdentifier "L")
    (ESub
       (EIdentifier "X")
       (ESub (EIdentifier "h") (EPhantom (EIdentifier "fail"))))
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <msub>
      <mi>L</mi>
      <msub>
        <mi>X</mi>
        <mi>h</mi>
      </msub>
    </msub>
    <mo>=</mo>
    <msub>
      <mi>L</mi>
      <msub>
        <mi>X</mi>
        <msub>
          <mi>h</mi>
          <mphantom>
            <mi>fail</mi>
          </mphantom>
        </msub>
      </msub>
    </msub>
  </mrow>
</math>