texmath-0.12.5: test/writer/mml/mfrac4.test

<<< native
[ EFraction
    NormalFrac
    (EGrouped [ ENumber "1" , ESymbol Bin "+" , ESqrt (ENumber "5") ])
    (ENumber "2")
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mfrac>
    <mrow>
      <mn>1</mn>
      <mo>+</mo>
      <msqrt>
        <mn>5</mn>
      </msqrt>
    </mrow>
    <mn>2</mn>
  </mfrac>
</math>