texmath-0.12.5: test/writer/eqn/munderover-08.test

<<< native
[ EUnderover
    False
    (EUnderover
       False
       (EIdentifier "BASE")
       (EIdentifier "under-1")
       (EPhantom (EIdentifier "fail")))
    (EIdentifier "under-2")
    (EPhantom (EIdentifier "fail"))
, ESymbol Rel "="
, EUnder
    False
    (EUnder False (EIdentifier "BASE") (EIdentifier "under-1"))
    (EIdentifier "under-2")
]
>>> eqn
{BASE from under-1 to {hphantom fail}} from under-2 to {hphantom fail} = {BASE from under-1} from under-2