Add reminder about PEP293
diff --git a/Doc/whatsnew/whatsnew23.tex b/Doc/whatsnew/whatsnew23.tex
index ff16de1..5375775 100644
--- a/Doc/whatsnew/whatsnew23.tex
+++ b/Doc/whatsnew/whatsnew23.tex
@@ -457,6 +457,20 @@
\end{seealso}
+%======================================================================
+\section{PEP 293: Codec Error Handling Callbacks}
+
+XXX write this section
+
+\begin{seealso}
+
+\seepep{293}{Codec Error Handling Callbacks}{Written and implemented by
+Walter Dörwald.}
+
+\end{seealso}
+
+
+%======================================================================
\section{Extended Slices\label{section-slices}}
Ever since Python 1.4, the slicing syntax has supported an optional