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/libimgfile.tex b/Doc/lib/libimgfile.tex
index 96afc9b..098d59b 100644
--- a/Doc/lib/libimgfile.tex
+++ b/Doc/lib/libimgfile.tex
@@ -9,7 +9,7 @@
The module defines the following variables and functions:
-\renewcommand{\indexsubitem}{(in module imgfile)}
+\setindexsubitem{(in module imgfile)}
\begin{excdesc}{error}
This exception is raised on all errors, such as unsupported file type, etc.
\end{excdesc}