adjust text in settings.rst

Author: escattone

docs/settings.rst

@@ -129,15 +129,14 @@ of ``mozilla-django-oidc``.
 
 .. py:attribute:: OIDC_REDIRECT_ALLOWED_HOSTS
 
-   :default: ``None``
+   :default: ``[]``
 
-   List of hosts which are allowed to be redirected to (must be of List type).
-   The redirect URL specified by the OIDC_REDIRECT_FIELD_NAME field must match a host
-   in this list.
+   List of hosts which are allowed to be redirected to. The redirect URL specified by
+   the OIDC_REDIRECT_FIELD_NAME field must match a host in this list.
 
    .. note::
 
-      Whilst there is no default, a request's host is always allowed.
+      Although there is no default, a request's host is always allowed.
 
 .. py:attribute:: OIDC_REDIRECT_FIELD_NAME