texmath-0.12.5: test/roundtrip/munderover-03.native

[ EUnderover
    False
    (EIdentifier "_ baseline _")
    (EIdentifier "under script")
    (EPhantom (EIdentifier "fail"))
, ESymbol Rel "="
, EUnder
    False (EIdentifier "_ baseline _") (EIdentifier "under script")
]