texmath-0.12.5: test/writer/tex/msup-11.test

<<< native
[ ESuper (EIdentifier "e") (EIdentifier "x")
, ESymbol Rel "="
, EOver
    False
    (ESuper (EIdentifier "e") (EIdentifier "x"))
    (EPhantom (EIdentifier "z"))
]
>>> tex
e^{x} = \overset{\phantom{z}}{e^{x}}