texmath-0.12.5: test/writer/mml/sum1.test

<<< native
[ EUnderover
    False
    (ESymbol Op "\8721")
    (EGrouped [ EIdentifier "i" , ESymbol Rel "=" , ENumber "0" ])
    (EIdentifier "\8734")
, ESub (EIdentifier "x") (EIdentifier "i")
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <munderover>
      <mo>∑</mo>
      <mrow>
        <mi>i</mi>
        <mo>=</mo>
        <mn>0</mn>
      </mrow>
      <mi>∞</mi>
    </munderover>
    <msub>
      <mi>x</mi>
      <mi>i</mi>
    </msub>
  </mrow>
</math>