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/libtime.tex b/Doc/libtime.tex
index 74e8104..e05cad2 100644
--- a/Doc/libtime.tex
+++ b/Doc/libtime.tex
@@ -58,7 +58,7 @@
 
 The module defines the following functions and data items:
 
-\renewcommand{\indexsubitem}{(in module time)}
+\setindexsubitem{(in module time)}
 
 \begin{datadesc}{altzone}
 The offset of the local DST timezone, in seconds west of the 0th