Comment Re: what documentation? (Score 2) 20
Open a PR that comments the code. Don't refactor it, *just comment*. Note that in the bug title. I'll bet it is much appreciated and merged, although of course YMMV.
Everybody wants to hack in some feature that scratches their itch, few are willing to do the other 90% of the work to actually deliver robust code. If you do some of that work, you are in some non-binding way called "goodwill" buying a little of the maintainer's time to evaluate your eventual feature PR.