* Add PR checklist document.

* Update docs/pr_checklist.md

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Ryan <fauxpark@gmail.com>

* Reword the lower/raise/adjust suggestion somewhat for clarity.

* Add suggestion from @Didel for coding conventions.

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
Co-authored-by: Ryan <fauxpark@gmail.com>