Update __fzf_search_current_dir.fish

It will solve "unknown file types in __fzf_preview_file".

It wasn't working because the current directory (see pwd output in __fzf_preview_file function) of the preview context is $HOME (I don't know why ... I just spent 3 hours debugging it).

To understand why I removed the colors: sharkdp/bat#448 (comment)

Thank you for your work.

functions/__fzf_search_current_dir.fish

@@ -2,9 +2,10 @@ function __fzf_search_current_dir --description "Search the current directory us
     # Make sure that fzf uses fish to execute __fzf_preview_file.
     # See similar comment in __fzf_search_shell_variables.fish.
     set --local --export SHELL (command --search fish)
+    set current_dir (pwd)
     set file_paths_selected (
-        fd --hidden --follow --color=always --exclude=.git 2>/dev/null |
-        fzf --multi --ansi --preview='__fzf_preview_file {}'
+        fd --hidden --follow --color=never --exclude=.git 2>/dev/null |
+        fzf --multi --preview "__fzf_preview_file $current_dir/{}"
     )
 
     if test $status -eq 0