simpler and more correct file detection

fix-dotfile-paths.sh

@@ -13,7 +13,7 @@ create_ls_entry () {
         fi
     done
     files=$(find -L -- . -maxdepth 1 -type f | sed 's/^\.\///')
-    if [ "$(echo "$files" | wc -l | sed 's/[ \t]*//g')" != 0 ]; then
+    if [ "$files" != '' ]; then
         echo '* Files' >> index.org
         echo "$files" | sort | while read -r file; do
             if [ "$file" = ".wallpaper" ]; then