texmath-0.13.1.2: test/writer/mml/choose.test

<<< native
[ EDelimited
    "("
    ")"
    [ Right
        (EFraction
           NoLineFrac
           (EIdentifier "a")
           (EDelimited
              "{"
              "}"
              [ Right
                  (EFraction
                     NoLineFrac
                     (EIdentifier "b")
                     (EGrouped [ EIdentifier "c" , ESymbol Bin "+" , ENumber "2" ]))
              ]))
    ]
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mo stretchy="true" form="prefix">(</mo>
    <mfrac linethickness="0">
      <mi>a</mi>
      <mrow>
        <mo stretchy="true" form="prefix">{</mo>
        <mfrac linethickness="0">
          <mi>b</mi>
          <mrow>
            <mi>c</mi>
            <mo>+</mo>
            <mn>2</mn>
          </mrow>
        </mfrac>
        <mo stretchy="true" form="postfix">}</mo>
      </mrow>
    </mfrac>
    <mo stretchy="true" form="postfix">)</mo>
  </mrow>
</math>