texmath-0.13: test/writer/mml/mfracZcomp-02.test

<<< native
[ EText TextNormal "Inline, display style, normal line\160"
, EFraction
    NormalFrac
    (EGrouped
       [ EMathOperator "ln" , ESymbol Ord "\8289" , EIdentifier "x" ])
    (EIdentifier "y")
, EText
    TextNormal ", numerator and denominator should render normal size."
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mtext mathvariant="normal">Inline, display style, normal line </mtext>
    <mfrac>
      <mrow>
        <mrow>
          <mi mathvariant="normal">ln</mi>
          <mo>&#8289;</mo>
        </mrow>
        <mi>x</mi>
      </mrow>
      <mi>y</mi>
    </mfrac>
    <mtext mathvariant="normal">, numerator and denominator should render normal size.</mtext>
  </mrow>
</math>