Add item pertaining to
[ 680429 ] __module__ broken for extension classes
diff --git a/Doc/whatsnew/whatsnew23.tex b/Doc/whatsnew/whatsnew23.tex
index 446ce43..e79f6c4 100644
--- a/Doc/whatsnew/whatsnew23.tex
+++ b/Doc/whatsnew/whatsnew23.tex
@@ -1973,6 +1973,15 @@
removing any dependence on a system version or local installation of
Expat.
+\item If you dynamically allocate type objects in your extension, you
+should be aware of a change in the rules rules relating to the
+\member{__module__} and \member{__name__} attributes. In summary,
+you will want to ensure the type's dictionary contains a
+\code{'__module__'} key; making the module name the part of the type
+name leading up to the final period will no longer have the desired
+effect. For more detail, read the API reference documentation or the
+source.
+
\end{itemize}