[Patch #476612] Change docs to describe PEP247 interface

Doc/lib/libmd5.tex

@@ -35,6 +35,16 @@ More condensed:
 '\xbbd\x9c\x83\xdd\x1e\xa5\xc9\xd9\xde\xc9\xa1\x8d\xf0\xff\xe9'
 \end{verbatim}
 
+The following values are provided as constants in the module and as
+attributes of the md5 objects returned by \function{new()}:
+
+\begin{datadesc}{digest_size}
+  The size of the resulting digest in bytes.  This is always
+  \code{16}.
+\end{datadesc}
+
+md5 objects support the following methods:
+
 \begin{funcdesc}{new}{\optional{arg}}
 Return a new md5 object.  If \var{arg} is present, the method call
 \code{update(\var{arg})} is made.

Doc/lib/libsha.tex

@@ -31,7 +31,7 @@ attributes of the sha objects returned by \function{new()}:
   hashed.
 \end{datadesc}
 
-\begin{datadesc}{digestsize}
+\begin{datadesc}{digest_size}
   The size of the resulting digest in bytes.  This is always
   \code{20}.
 \end{datadesc}