It also helps prevent duplicate path entries. I'd written an "add_to_path_if_not_present" function, but "fish_add_path" should do the same thing. It's just conv

It also helps prevent duplicate path entries. I'd written an "add_to_path_if_not_present" function, but "fish_add_path" should do the same thing. It's just convenience, but Fish is largely about convenience.