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/libselect.tex b/Doc/libselect.tex
index 4291dbf..956bf7f 100644
--- a/Doc/libselect.tex
+++ b/Doc/libselect.tex
@@ -5,7 +5,7 @@
 This module provides access to the function \code{select} available in
 most \UNIX{} versions.  It defines the following:
 
-\renewcommand{\indexsubitem}{(in module select)}
+\setindexsubitem{(in module select)}
 \begin{excdesc}{error}
 The exception raised when an error occurs.  The accompanying value is
 a pair containing the numeric error code from \code{errno} and the