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/libsys.tex b/Doc/lib/libsys.tex
index ae02d8d..f137052 100644
--- a/Doc/lib/libsys.tex
+++ b/Doc/lib/libsys.tex
@@ -1,4 +1,5 @@
 \section{Built-in Module \sectcode{sys}}
+\label{module-sys}
 
 \bimodindex{sys}
 This module provides access to some variables used or maintained by the