texmath-0.12.5: test/writer/mml/mfrac-08.test

<<< native
[ EFraction
    NormalFrac
    (EGrouped
       [ EPhantom (EIdentifier "a")
       , ENumber "12"
       , EPhantom (EIdentifier "a")
       ])
    (ENumber "13")
, ESymbol Rel "="
, EFraction
    NormalFrac
    (ENumber "12")
    (EGrouped
       [ EPhantom (EIdentifier "a")
       , ENumber "13"
       , EPhantom (EIdentifier "a")
       ])
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mfrac>
      <mrow>
        <mphantom>
          <mi>a</mi>
        </mphantom>
        <mn>12</mn>
        <mphantom>
          <mi>a</mi>
        </mphantom>
      </mrow>
      <mn>13</mn>
    </mfrac>
    <mo>=</mo>
    <mfrac>
      <mn>12</mn>
      <mrow>
        <mphantom>
          <mi>a</mi>
        </mphantom>
        <mn>13</mn>
        <mphantom>
          <mi>a</mi>
        </mphantom>
      </mrow>
    </mfrac>
  </mrow>
</math>