Yes, but that would mean the first gridline == 0 and the last gridline == -1, instead of the way the spec is written today, where the first gridline == 1 and th

Yes, but that would mean the first gridline == 0 and the last gridline == -1, instead of the way the spec is written today, where the first gridline == 1 and the last gridline == -1. For me, consistency wins here.