texmath-0.12.5: test/writer/mml/munder-01.test

<<< native
[ EUnder False (EIdentifier "BASE") (EIdentifier "under")
, ESymbol Rel "="
, EUnder
    False
    (EUnder False (EIdentifier "BASE") (EIdentifier "under"))
    (EPhantom (EIdentifier "under"))
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <munder>
      <mi>BASE</mi>
      <mi>under</mi>
    </munder>
    <mo>=</mo>
    <munder>
      <munder>
        <mi>BASE</mi>
        <mi>under</mi>
      </munder>
      <mphantom>
        <mi>under</mi>
      </mphantom>
    </munder>
  </mrow>
</math>