Apply improvements from go fix

[tianon]

These all seem pretty uncontroversial. 👀

[mvdan]

Thanks! Agreed this is fine. Could you send this change on Gerrit so we could merge it?

[tianon]

I guess I can give it a go, although it's not linked on either https://github.com/cue-labs/oci or https://github.com/cue-labs/oci/blob/3adeb866381942f8fcc777812752a5a9e8869b68/CONTRIBUTING.md 😅

Is there a good reference somewhere?

(FWIW, I find Gerrit to be extremely hostile UX; perhaps that's part of the point, but I figured I'd note it 🫣 🖤)

[mvdan]

Oh it's https://gerrithub.io; https://github.com/cue-lang/cue/blob/master/CONTRIBUTING.md might be a bit more complete. Just swap cue-lang/cue for cue-labs/oci. If you can't figure it out, no problem, I'll import to Gerrit on my side.

[tianon]

I don't see a way I can log into that without giving it push access to repositories for which I can't reasonably authorize that (which is admittedly a failing of GitHub's auth), so yeah, it might be best for you to import it instead 😅