I would really like to see if the split operation of
[list] would also accept negative indices to split a
list at a point searched from the end of a list.
I implemented this in the [list-splat] abstraction,
which is in abstractions/footils/list-abs/, however to
do this, I needed to revers the list several times,
which can be a performance problem, if lots of lists
need to be processed.
Splitting at negative indices feels like a natural
operation, and it will probably not break (m)any