texmath-0.12.5: test/reader/mml/msub-01.test

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

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