texmath-0.12.5: test/writer/eqn/munder-06.test

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