title: How do you change fish pwd length in prompt using fish_prompt_pwd_dir_length?
body: <p>I want fish shell to show full path in prompt. Looking at <a href="https://github.com/fish-shell/fish-shell/blob/master/share/functions/prompt_pwd.fish" rel="noreferrer">source</a> of pwd_prompt I see a variable named fish_prompt_pwd_dir_length, that should do what I want if I set it to 0.</p>
  
  <p>But when I do <code>set -U fish_prompt_pwd_dir_length 0</code> nothing happens.</p>
  
  <p>Looking in <code>fish_config</code> variables tab I see that this var is set to 0, but still path shown reduced.</p>
  
  <p>What am I doing wrong and can you actually do that without writing your own pwd_prompt function?</p>