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-rw-r--r--repoze/bfg/url.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/repoze/bfg/url.py b/repoze/bfg/url.py
index e6a693d8a..920e82d53 100644
--- a/repoze/bfg/url.py
+++ b/repoze/bfg/url.py
@@ -95,6 +95,9 @@ def route_url(route_name, request, *elements, **kw):
``request.application_url`` will be used as the prefix (the
default).
+ .. note:: Special treatment of ``_app_url`` was added in
+ :mod:`repoze.bfg` 1.3.
+
This function raises a :exc:`KeyError` if the URL cannot be
generated due to missing replacement names. Extra replacement
names are ignored.