Update error message

Signed-off-by: marinamoore <[email protected]>

Author: mnm678

tuf/client/updater.py

@@ -1933,8 +1933,8 @@ def _verify_merkle_path(self, metadata_role):
 
       # Does the result match the merkle root?
       if node_hash != merkle_root:
-        raise tuf.exceptions.RepositoryError('The merkle root does not match ' +
-            'the hash for ' + metadata_role)
+        raise tuf.exceptions.RepositoryError('The merkle root ' + merkle_root +
+            ' does not match the hash ' + node_hash + ' for ' + metadata_role)
 
       # return the verified snapshot contents
       return contents