prevent multiple entries in bakkedup-desktop-files

tromjaro/xfce/desktop-overlay/etc/skel/.local/bin/fix-tweaked-desktop-files

@@ -46,11 +46,13 @@ fixfiles() {
 			[ -f "$pacman_local/$name" ] ||
 			[ -f "$pacman_global/$name" ] ||
 			[ -f "$snap/$name" ] ||
-			mv "$file" "$file.bak" && echo "$line" >> "$data2"
+			{ mv "$file" "$file.bak" && echo "$line" >> "$data2"; }
 	done < "$data"
 
 	[ "$copied" = 'true' ] && [ "$(stat -c '%Y' "$data")" = "$lastmod" ] && sort "$tmp" | uniq > "$data"
 
+	[ -n "$(sort "$data2" | uniq -d)" ] && cp "$data2" "$tmp" && sort "$tmp" | uniq > "$data2"
+
 	for bakfile in "$user"/*.desktop.bak; do
 		origfile="${bakfile%.bak}"
 		[ -f "$origfile" ] && continue