Fix broken link

docs/api.rst

@@ -92,9 +92,9 @@ Incoming Request Data
    .. attribute:: base_url
    .. attribute:: url_root
 
-      Provides different ways to look at the current
+      Provides different ways to look at the current `IRI
-      `IRI<http://tools.ietf.org/html/rfc3987>`_.  Imagine your
+      <http://tools.ietf.org/html/rfc3987>`_.  Imagine your application is
-      application is listening on the following application root::
+      listening on the following application root::
 
           http://www.example.com/myapplication