Adjusted to use the new module synopsis support macros.
diff --git a/Doc/lib/libcmath.tex b/Doc/lib/libcmath.tex
index adce12f..5337967 100644
--- a/Doc/lib/libcmath.tex
+++ b/Doc/lib/libcmath.tex
@@ -1,7 +1,9 @@
\section{Built-in Module \module{cmath}}
-\label{module-cmath}
+\declaremodule{builtin}{cmath}
-\bimodindex{cmath}
+
+\modulesynopsis{Mathematical functions for complex numbers.}
+
This module is always available.
It provides access to mathematical functions for complex numbers.
The functions are: