Use the new module synopsis syntax, even though we don't need a synopsis table
for this chapter. This protects against backend changes for \declaremodule.
diff --git a/Doc/lib/libexcs.tex b/Doc/lib/libexcs.tex
index 02325af..3eaa3e0 100644
--- a/Doc/lib/libexcs.tex
+++ b/Doc/lib/libexcs.tex
@@ -1,6 +1,7 @@
\section{Built-in Exceptions}
-\label{module-exceptions}
-\stmodindex{exceptions}
+\declaremodule{standard}{exceptions}
+
+\modulesynopsis{Standard exceptions classes.}
Exceptions can be class objects or string objects. While