texmath-0.12.5: test/writer/tex/boxed.test

<<< native
[ EBoxed
    (EGrouped
       [ ESuper (EIdentifier "x") (ENumber "2")
       , ESymbol Bin "+"
       , ESuper (EIdentifier "y") (ENumber "2")
       , ESymbol Bin "+"
       , ESuper (EIdentifier "z") (ENumber "2")
       ])
]
>>> tex
\boxed{x^{2} + y^{2} + z^{2}}