The coord_to_col scheme broke when looking up the col for the coordinate get_forward_strand_end because ends are excluded, but this was still necessary to do a proper slice, since python slices are [start, end).
The coord_to_col scheme broke when looking up the col for the coordinate get_forward_strand_end because ends are excluded, but this was still necessary to do a proper slice, since python slices are [start, end).

bxlab/bx-python,bxlab/bx-python,bxlab/bx-python