texmath-0.13: test/writer/mml/menclose.test

<<< native
[ EBoxed (ENumber "0")
, ECancel ForwardSlash (ENumber "1")
, ECancel BackSlash (ENumber "2")
, ECancel XSlash (ENumber "3")
]

>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <menclose notation="box">
      <mn>0</mn>
    </menclose>
    <menclose notation="updiagonalstrike">
      <mn>1</mn>
    </menclose>
    <menclose notation="downdiagonalstrike">
      <mn>2</mn>
    </menclose>
    <menclose notation="updiagonalstrike downdiagonalstrike">
      <mn>3</mn>
    </menclose>
  </mrow>
</math>