texmath-0.12.5: test/writer/eqn/munder-04.test

<<< native
[ EUnder False (EIdentifier "middle") (EIdentifier "bottom")
, ESymbol Rel "="
, EUnderover
    False
    (EIdentifier "middle")
    (EIdentifier "bottom")
    (EPhantom (EIdentifier "fail"))
]
>>> eqn
middle from bottom = middle from bottom to {hphantom fail}