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

<<< native
[ ESuper
    (EGrouped [ EPhantom (EIdentifier "fail") , EIdentifier "k" ])
    (ENumber "2")
, ESymbol Rel "="
, ESuper (EIdentifier "k") (ENumber "2")
]
>>> eqn
{hphantom fail k} sup 2 = k sup 2