texmath-0.12.5: test/writer/eqn/munderover-10.test

<<< native
[ EUnderover
    False (EIdentifier "B") (EIdentifier "under") (EIdentifier "over")
, ESymbol Rel "="
, EOver
    False
    (EUnder False (EIdentifier "B") (EIdentifier "under"))
    (EIdentifier "over")
]
>>> eqn
B from under to over = {B from under} to over