<!--
Thanks for the contribution! I really appreciate it

FYI Our goals are to keep the API simple and the code fast.  If it can be done
with `ToCase` or a custom Caser, it might not be a good fit.
-->

### What does this fix or improve?



### Is this a breaking change API change or change in behavior?



### Checklist:
<!--
Put an `x` in all the boxes that you've completed.

You don't need to have everything done before opening a PR.

If you're unsure, don't hesitate to ask. Happy to help!
-->
- [ ] I have updated the documentation accordingly, if needed.
- [ ] I have added appropriate tests, if needed.


<!-- Thanks! -->
