prompt_pwd -d1 -D3 fails for current directories that starts with dash

[UgurcanAkkok]

There is an error with the prompt_pwd.fish for directories that starts with a dash "-"

Fish version:

➜ fish --version
fish, version 3.6.4
➜ echo $version
3.6.4

Arch Linux, uname: Linux dell 6.6.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 21 Dec 2023 19:01:01 +0000 x86_64 GNU/Linux

When i tried it with the given sh -c command, there was no failure for the prompt but when i manually call prompt_pwd -d1 -D3 it failes with the error below. The error is in https://github.com/fish-shell/fish-shell/blob/master/share/functions/prompt_pwd.fish this file.

To produce:

1. cd into a directory that starts with a dash, for example: /tmp/tmp.nXGZLMSMrj/-a
2. call prompt_pwd -d1 -D3

The error is:

string join: -a: unknown option

/usr/share/fish/functions/prompt_pwd.fish (line 48): 
            string join / (string replace -ar '(\.?[^/]{'"$fish_prompt_pwd_dir_length"'})[^/]*/' '$1/' $tmp) $full
            ^
in function 'prompt_pwd' with arguments '-d1 -D3'

(Type 'help string' for related documentation)

[UgurcanAkkok]

Thanks for the very quick fix!