Added index entry and \label{} for exceptions module. This isn't in the
normal modules portion of the manual, but that's the basic effect of this
section with the 1.5 change in exception support.
diff --git a/Doc/lib/libexcs.tex b/Doc/lib/libexcs.tex
index cd49af5..758c14a 100644
--- a/Doc/lib/libexcs.tex
+++ b/Doc/lib/libexcs.tex
@@ -1,4 +1,6 @@
\section{Built-in Exceptions}
+\label{module-exceptions}
+\stmodindex{exceptions}
Exceptions can be class objects or string objects. While
traditionally, most exceptions have been string objects, in Python