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/lib/libzlib.tex b/Doc/lib/libzlib.tex
index ab30a32..28365ae 100644
--- a/Doc/lib/libzlib.tex
+++ b/Doc/lib/libzlib.tex
@@ -1,4 +1,5 @@
\section{Built-in Module \sectcode{zlib}}
+\label{module-zlib}
\bimodindex{zlib}
For applications that require data compression, the functions in this
@@ -95,5 +96,8 @@
action is to delete the object.
\end{funcdesc}
+\begin{seealso}
+\seemodule{gzip}{reading and writing \file{gzip}-format files}
+\end{seealso}