call dump_string instead of dump

diff --git a/sfa/trust/credential.py b/sfa/trust/credential.py
index bd7e7f1..ceed5af 100644 (file)
--- a/sfa/trust/credential.py
+++ b/sfa/trust/credential.py
@@ -965,6 +965,6 @@ class Credential(object):
 
         if self.parent and dump_parents:
             result += "\nPARENT"
-            result += self.parent.dump(True)
+            result += self.parent.dump_string(True)
 
         return result