[BUG (soft)] fillholes_pushpull maybe should be aliased as fillholes_pullpush

[alister-chowdhury]

Hey Larry,

So this isn't really a problem in practice, but it seems the algorithm is referred to as "pull push" by atleast a few papers.

I just noticed that in OIIO we refer to it as "push pull".

(Push and pull seems to be an unrelated thing that I won't pretend I understand: https://home.ubalt.edu/ntsbarsh/business-stat/opre/PushPull.pdf)

Does this matter?
Probably not, nobody else has noticed and it's clear what the intention is, certainly wouldn't be worth breaking existing code over.

But I figured it was probably atleast letting you know.

Many thanks,
Alister