Update docs for bool changes by Guido around April 6
diff --git a/Doc/lib/libzipfile.tex b/Doc/lib/libzipfile.tex
index 74dc942..a6430cb 100644
--- a/Doc/lib/libzipfile.tex
+++ b/Doc/lib/libzipfile.tex
@@ -48,8 +48,8 @@
\end{classdesc}
\begin{funcdesc}{is_zipfile}{filename}
- Returns true if \var{filename} is a valid ZIP file based on its magic
- number, otherwise returns false. This module does not currently
+ Returns \code{True} if \var{filename} is a valid ZIP file based on its magic
+ number, otherwise returns \code{False}. This module does not currently
handle ZIP files which have appended comments.
\end{funcdesc}