> Or perhaps I have it backwards and "l1" and "l2" need to be swapped in
> that description. But the mere fact that there is any question about
> that means that the function is poorly documented and perhaps poorly
> named as well. For that matter, is there a good reason why l1/l2
> have those roles and not the reverse?
Consistency. I organized all xxx_closept_yyy(Point *result, xxx *l1,
yyy *l2) functions in a way that they find the find the point on "l1".
