The files in
~/RetroPie/roms/ports/duke3d/
Are.symlinked (you are correct)
To
/opt/retropie/ports/eduke32/shareware/
When you delete the symlinked files in the home folder I think it may only delete the symlinks and not the the files in the shareware folder (not super familiar with it myself, I’m still learning too) not exactly sure though, I don’t have the original dukenukem files so I haven’t had the chance to test it myself.
But as far as wiki edits go anyone can contribute, all you need to do is sign up for a github account (its free) and then when you’re signed in, there will be an edit button for each wiki page that youre on and you can change whatever you like (provided its productive of course)
This is the page to edit just for reference:
https://github.com/retropie/RetroPie-Setup/wiki/Duke-Nukem-3D
I appreciate it.
Also BTW in github wikis format is called markdown, its similar to html. There are some basic tools in the editor much like this forum- bold, headings etc.