Specify encoding.

[jaraco]

Fixes failures when PYTHONWARNDEFAULTENCODING=1. Fixes #577.

[layday]

Thanks!

[henryiii]

I though we had a static check for this - thanks!

Hmm, not seeing one in Ruff. Not sure to find one, then. I guess we can set the PYTHONWARNDEFAULTENCODING variable in the tests.

[jaraco]

I recommend setting that var. that’s what I’ve done in other projects and how i found this one. I’ll update the PR.

[layday]

I would prefer if the env var was injected with pytest-env so that the tests behave identically when run directly with pytest. Can do that in a follow-up if you'd prefer not to spend more time on this.

[jaraco]

I would prefer if the env var was injected with pytest-env so that the tests behave identically when run directly with pytest. Can do that in a follow-up if you'd prefer not to spend more time on this. You're welcome to push to my branch to include in this PR.

Please do. Since there's no prior art in this repo for it, I'd prefer if a maintainer took it on so it ends up in the preferred place with the preferred style.

I see some tests failing, and the failures don't appear to me to be related to the change. Please let me know if you need anything from me to handle that situation.