> \- would be a good name candidate Unfortunately not really. You may have missed the & story many years ago :-)
Araq used & instead of + for seq concatenation. One of his motivation was that he later might use + as "[1, 2] + [3, 4]" resulting in [4, 6]. The other reason may be that array concatenation is not really a math operation. So as we have & now for concatenation, we may want to reserve - for "[1, 2] - [3, 4]" resulting in [-2, -2].
