texmath-0.13.1.2: test/writer/mml/mrootSfonts3.test

<<< native
[ EFraction
    NormalFrac
    (ERoot
       (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ])
       (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ]))
    (ERoot
       (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ])
       (EGrouped [ ENumber "3" , EIdentifier "x" ]))
, ERoot (EIdentifier "x") (ENumber "3")
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mfrac>
      <mroot>
        <mrow>
          <mi>x</mi>
          <mo>-</mo>
          <mn>3</mn>
        </mrow>
        <mrow>
          <mi>x</mi>
          <mo>-</mo>
          <mn>3</mn>
        </mrow>
      </mroot>
      <mroot>
        <mrow>
          <mn>3</mn>
          <mi>x</mi>
        </mrow>
        <mrow>
          <mi>x</mi>
          <mo>-</mo>
          <mn>3</mn>
        </mrow>
      </mroot>
    </mfrac>
    <mroot>
      <mn>3</mn>
      <mi>x</mi>
    </mroot>
  </mrow>
</math>