texmath-0.13.1.2: test/writer/mml/verbar2.test

<<< native
[ EDelimited
    "|"
    "|"
    [ Right (EFraction NormalFrac (EIdentifier "H") (EIdentifier "K"))
    ]
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mo stretchy="true" form="prefix">|</mo>
    <mfrac>
      <mi>H</mi>
      <mi>K</mi>
    </mfrac>
    <mo stretchy="true" form="postfix">|</mo>
  </mrow>
</math>