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/libppath.tex b/Doc/libppath.tex
index 5298012..d286dcc 100644
--- a/Doc/libppath.tex
+++ b/Doc/libppath.tex
@@ -8,7 +8,7 @@
 module \code{os} and use \code{os.path}.
 \refstmodindex{os}
 
-\renewcommand{\indexsubitem}{(in module posixpath)}
+\setindexsubitem{(in module posixpath)}
 
 \begin{funcdesc}{basename}{p}
 Return the base name of pathname