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/libctb.tex b/Doc/libctb.tex
index a5aab71..073c649 100644
--- a/Doc/libctb.tex
+++ b/Doc/libctb.tex
@@ -1,4 +1,5 @@
 \section{Built-in Module \sectcode{ctb}}
+\label{module-ctb}
 \bimodindex{ctb}
 \renewcommand{\indexsubitem}{(in module ctb)}