Completion (Bash): fixes --config/-c path completion splitting on spaces (#2621) [ci skip]

Co-authored-by: Carter Li <CarterLi@users.noreply.github.com>

completions/fastfetch.bash

@@ -33,7 +33,9 @@ _fastfetch() {
       if type _filedir &>/dev/null; then
         _filedir
       elif type compgen &>/dev/null; then
-        COMPREPLY+=($(compgen -f -- "$cur"))
+        local -a files
+        readarray -t files < <(compgen -f -- "$cur")
+        COMPREPLY+=("${files[@]}")
       fi
       return
       ;;