Documentation on admin/build/path/subdomain doesn't mention the tilde before the token

Hi,

I wasn't able to get my domain aliases working until I put a tilde in the pathauto config: ~[subdomain]. This seems to square with the code from subdomain_url_rewrite_inbound:

    $alias = "~". $subdomain . ($alias_path ? "/$alias_path" : "");

but isn't mentioned in the documentation at the bottom of the "Subdomain settings" page at admin/build/path/subdomain. Am I missing something, or is the documentation missing it instead? :)

(Great module - looks like it'll slot right into what we're doing.)