AMK's megapatch:
* \bcode, \ecode added everywhere
* \label{module-foo} added everywhere
* A few \seealso sections added.
* Indentation fixed inside verbatim in lib*tex files
diff --git a/Doc/libmath.tex b/Doc/libmath.tex
index 765fcdf..935b940 100644
--- a/Doc/libmath.tex
+++ b/Doc/libmath.tex
@@ -1,4 +1,5 @@
\section{Built-in Module \sectcode{math}}
+\label{module-math}
\bimodindex{math}
\renewcommand{\indexsubitem}{(in module math)}
@@ -70,3 +71,7 @@
\else
\code{pi} and \code{e}.
\fi
+
+\begin{seealso}
+\seealso{cmath}{versions of these functions that can handle complex numbers}
+\end{seealso}