Kubernetes for Golang.
This has been brought up as an example of fine documentation:
https://github.com/kubernetes/kubernetes/blob/ec2e767e593953...
Requests for Python https://github.com/psf/requests
Requests for Python https://github.com/psf/requests
Comments like the one cited are fantastic, but we're interested in examplars of good (i.e., elegant and readable) code, not ancillary matter.
[1] https://fosdem.org/2019/schedule/event/kubernetesclusterfuck...
If you can comprehensively test, then the docs can live there, and you don't need quite so many warnings about introducing bugs.