invalid digest %s algorithm, thanks Jonathan

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-07-20 11:27:33) dev
+Version 2.00.0 (2012-07-20 12:47:01) dev

gluon/utils.py

@@ -69,7 +69,7 @@ def get_digest(value):
     elif value == "sha512":
         return hashlib.sha512
     else:
-        raise ValueError("Invalid digest algorithm")
+        raise ValueError("Invalid digest algorithm: %s" % value) 
 
 DIGEST_ALG_BY_SIZE = {
     128/4: 'md5',