063_extensible_arrows_use_centered_scripts.test

<<< native
[ EIdentifier "X"
, EOver False (ESymbol Op "\8660") (EIdentifier "h")
, EIdentifier "Y"
, EUnderover
    False (ESymbol Op "\8658") (EIdentifier "k") (EGrouped [])
, EIdentifier "Z"
]
>>> starmath
X dlrarrow csup {h} Y drarrow csub {k} Z