texmath-0.12.5: test/writer/mml/mo1.test

<<< native
[ ESymbol Bin "-" , ENumber "1" ]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mo>-</mo>
    <mn>1</mn>
  </mrow>
</math>