Added description of the md5.hexdigest() method.
diff --git a/Doc/lib/libmd5.tex b/Doc/lib/libmd5.tex
index 8800e50..7400a2e 100644
--- a/Doc/lib/libmd5.tex
+++ b/Doc/lib/libmd5.tex
@@ -60,6 +60,11 @@
non-\ASCII{} characters, including null bytes.
\end{methoddesc}
+\begin{methoddesc}[md5]{hexdigest}{}
+Like \method{digest()} except the digest is returned as a string of
+length 32, containing only hexadecimal digits.
+\end{methoddesc}
+
\begin{methoddesc}[md5]{copy}{}
Return a copy (``clone'') of the md5 object. This can be used to
efficiently compute the digests of strings that share a common initial