rewrapChunk

The binary arithmetic operations on two Series of equal length: both operands are cast to the supertype first, one dispatch runs the kernel, nulls propagate, and the integer guards null their slots. STRING and the temporal kinds throw through supertypeOf (temporal arithmetic is banned). Integer `/` yields FLOAT64; integer `/` and `%` guard divisor zero and T.min % -1 per element (on null slots too); overflow wraps like D.