Docs typo.

[Exoth]

In the docs you have such examples:

SitemapGenerator::Sitemap.sitemaps_path = "sitemaps/google"

But sitemaps_path must end with slash. Otherwise at least ping address is going to not include the 'google' part due to the way URI.join works.
So the docs should be fixed. Even better, slash could be added automatically if required to the end of sitemaps_path.