tweak urlto description

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 33db3e707d8ad816bcc80a807ec8c8098fe72ec7..726ace8d39cf88e3050e6bca729fe508547af0c1 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -988,9 +988,10 @@ Construct a relative url to the first parameter from the page named by the
 second. The first parameter can be either a page name, or some other
 destination file, as registered by `will_render`.
 
-If the second parameter is `undef`, the URL will be valid from any page on the
-wiki, or from the CGI; if possible it'll be a path starting with `/`, but an
-absolute URL will be used if the wiki and the CGI are on different servers.
+If the second parameter is `undef` (or not specified), the URL will be
+valid from any page on the wiki, or from the CGI; if possible it'll
+be a path starting with `/`, but an absolute URL will be used if
+the wiki and the CGI are on different domains.
 
 If the third parameter is passed and is true, an absolute url will be
 constructed instead of the default relative url.