[ui/registration] updated doc in forms.txt

beat/web/ui/registration/docs/forms.txt

@@ -23,7 +23,7 @@ requires the password to be entered twice to catch typos.
 Subclasses should feel free to add any additional validation they
 need, but should either preserve the base ``save()`` or implement a
 ``save()`` method which returns a ``User``.
-    
+
 Fields:
 
 ``username``
@@ -40,6 +40,10 @@ Fields:
 ``password2``
     The password, again, to catch typos.
 
+``godfather``
+    The godfather that will validate this account.
+
+
 
 Non-validation methods:
 
@@ -71,6 +75,6 @@ implementations of useful customizations:
     Subclass of ``RegistrationForm`` which disallows registration with
     email addresses from popular free webmail services; moderately
     useful for preventing automated spam registrations.
-    
+
     To change the list of banned domains, subclass this form and
     override the attribute ``bad_domains``.