Use document of CuPy operator
@@ -679,7 +679,7 @@ class ufunc(core.ufunc):
self.nargs = fusion_op.nargs
self._ops = fusion_op._ops
self._preamble = fusion_op._preamble
- self.__doc__ = fusion_op.__doc__
+ self.__doc__ = cupy_op.__doc__
self._params = fusion_op._params
self._routine_cache = fusion_op._routine_cache
