I wanted to commit some more stuff for 2020. Better late than never,
right? The most significant change is probably in fish_prompt.fish.
I fixed an edge case where the directory in question could be the
same as the user's username.
Instead of "hiding" dotfiles in an extra group, it is easier to use
separate packages for each unique set of files. Since I'm working on
making my setup more modular, and since I can stow all my dotfiles with
a single command anyway, this configuration is more appealing now.