texmath-0.12.5: test/reader/mml/msub-02.test

<<< mml
<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">  <msub>    <mrow>      <mphantom>        <mi>fail</mi>
      </mphantom>
      <mi>X</mi>
    </mrow>     <mn>0</mn>   </msub>   <mo>=</mo>   <msub>    <mi>X</mi>     <mn>0</mn>   </msub> </math>
>>> native
[ ESub
    (EGrouped [ EPhantom (EIdentifier "fail") , EIdentifier "X" ])
    (ENumber "0")
, ESymbol Rel "="
, ESub (EIdentifier "X") (ENumber "0")
]