Give this a try:
git clone --single-branch -b hugo-forum-topic-54465 https://github.com/jmooring/hugo-testing hugo-forum-topic-54465
cd hugo-forum-topic-54465
hugo server
Files of interest:
- layouts/_partials/build-page-collection.html
- layouts/_partials/nav-prev-next-guides.html
Requires v0.146.7 or later.