Due to my love for the application Quod Libet, I have been contributing a bit to it. But due the complexity of the code, I looked elsewhere, and found a favorite tool package management tool, wajig, and was surprised to find that it's not kept in a VCS. Useful as it is, its code looks like a collection of hacks, so I started by offering a PEP-8 fix.
[a day later] Inspired by that offer, the nice guy that founded the project created a VCS repo for it, and even offered me commit rights. I was amazed by the trust.