[t-3]

There are a multitude of manpagers and viewers and frontends. It's one of those things you can write yourself very easily.

[IshKebab]

Any that have this feature? I did try batman but it only replaces the pager; not the man frontend which is where this change would need to happen.

[t-3]

Not that I know of, but I haven't looked. I have written a similar program for pulling arm64 instruction pages (which have many duplicates), the whole thing is under 100 lines, and most of that is printing and file IO that would be handled by the manpager, the actual finding dups and presenting a menu is even simpler.