texmath-0.12.5: test/writer/eqn/msqrt-04.test

<<< native
[ ESqrt
    (EArray
       [ AlignCenter ]
       [ [ [ EPhantom (EIdentifier "A") ] ]
       , [ [ EPhantom (EIdentifier "A") ] ]
       , [ [ EPhantom (EIdentifier "A") ] ]
       ])
]
>>> eqn
sqrt {matrix{
ccol{ {hphantom A} above {hphantom A} above {hphantom A} }
}}