Remove all \bcode / \ecode cruft; this is no longer needed.  See previous
checkin of myformat.sty.

Change "\renewcommand{\indexsubitem}{(...)}" to "\setindexsubitem{(...)}"
everywhere.

Some other minor nits that I happened to come across.
diff --git a/Doc/lib/libresource.tex b/Doc/lib/libresource.tex
index 7af4368..6260a20 100644
--- a/Doc/lib/libresource.tex
+++ b/Doc/lib/libresource.tex
@@ -11,7 +11,7 @@
 
 A single exception is defined for errors:
 
-\renewcommand{\indexsubitem}{(in module resource)}
+\setindexsubitem{(in module resource)}
 
 \begin{excdesc}{error}
   The functions described below may raise this error if the underlying