Within package a, I have directory .config/c/d. I want stow to ignore d, while stowing everything else.
So, I first did stow -D a -t ~, verifying that c was no longer in ~/.config. Then, I added to the .stow-local-ignore in a this line:
\.config/c/d
I then did stow a -t ~. However, when I check ~/.config, I see a symlink c, with d inside.
I noticed that if the line was just \.config/c, c isn't symlinked in .config.
This does work if I use --no-folding.