This works for any wordpress directory.
If you have a WordPress website and have noticed that some thing has added index.html or a plugin has added it.
Example would be http://pinguisweb.com/about/index.html.
The code below will redirect to http://pinguisweb.com/about/ and drop index.html
RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - RewriteRule ^index\.html$ / RewriteRule ^(.*)/index\.html$ /$1/
to your .htaccess file
How to redirect subdirectory to url with htaccess file
This will redirect all references to Car-Sales directory to the car-sales file. RedirectMatch 301 ^/Car-Sales/.*$ http://pinguisweb.com/car-sales/