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/libcode.tex b/Doc/libcode.tex
index a2d77fe..04790a0 100644
--- a/Doc/libcode.tex
+++ b/Doc/libcode.tex
@@ -7,7 +7,7 @@
 
 The \code{code} module defines the following functions:
 
-\renewcommand{\indexsubitem}{(in module code)}
+\setindexsubitem{(in module code)}
 
 \begin{funcdesc}{compile_command}{source, \optional{filename\optional{, symbol}}}
 This function is useful for programs that want to emulate Python's