Implement a safer and more predictable interpolation approach.
Closes SF bug #511737.
diff --git a/Doc/lib/libcfgparser.tex b/Doc/lib/libcfgparser.tex
index 946590d..0ad9d61 100644
--- a/Doc/lib/libcfgparser.tex
+++ b/Doc/lib/libcfgparser.tex
@@ -59,6 +59,16 @@
and will override any value provided in \var{defaults}.
\end{classdesc}
+\begin{classdesc}{SafeConfigParser}{\optional{defaults}}
+Derived class of \class{ConfigParser} that implements a more-sane
+variant of the magical interpolation feature. This implementation is
+more predictable as well.
+% XXX Need to explain what's safer/more predictable about it.
+New applications should prefer this version if they don't need to be
+compatible with older versions of Python.
+\versionadded{2.3}
+\end{classdesc}
+
\begin{excdesc}{NoSectionError}
Exception raised when a specified section is not found.
\end{excdesc}