tab size

[asottile]

is this even available in python? do I need ctypes shenanigans? should I make a PR to cpython to add this api?

[asottile]

I did add curses.set_tabsize for python3.9 here: python/cpython#16938

[asottile]

probably just implement this in code and not rely on the curses tab width stuff -- probably easier that way

[hbjydev]

I would default this to 4, that's the most common one. Then in a potential .babirc let users set that independently.

[asottile]

this was done at some point and is now "configurable" thanks to #69 -- I'll eventually add some sort of rcfile to make this a little easier