Great plugin, one small adjustment needed

Great plugin, thank you author!

There is a small adjustment needed though (I suppose it is just a slip). It is needed for styling and I have already done it for a site we are developing right now:

In the file wp-sitemap-page.php, you need to modify the function wsp_return_content_type_post, so that it reads:

function wsp_return_content_type_post() {
...
$return .= '<h2 class="wsp-posts-title">'.__('Posts by category', 'wp_sitemap_page').'</h2>'."\n";
...
}