my fish prompt the way I like it :^)

fish_prompt.fish

function fish_prompt --description 'Write out the prompt'
	set -l color_cwd
    set -l suffix
    switch "$USER"
        case root toor
            if set -q fish_color_cwd_root
                set color_cwd $fish_color_cwd_root
            else
                set color_cwd $fish_color_cwd
            end
            set suffix '#'
        case '*'
            set color_cwd $fish_color_cwd
            set suffix 'λ'
    end

    echo -n -s "$USER" : (prompt_hostname) (set_color $color_cwd) (prompt_pwd) (set_color normal) ' ' "$suffix "
end