Why does (file-exists-p "") return t?

[Edgar Vincent]

Hello everyone,

I just noticed that (file-exists-p “”) returns t on my system (Emacs 28.2 on 
Arch Linux).
I am not familiar with Emacs’ file handling internals, so the answer might be 
obvious.
However, I did not find any mention of this case in the docstring or the Elisp 
manual.

Thanks a lot,

Edgar Vincent