texmath-0.12.5: test/writer/eqn/munder-02.test

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