Collapse initial payload to a single stanza instead of a list if only one stanza is found.

sleekxmpp/plugins/xep_0050/adhoc.py

@@ -218,6 +218,9 @@ class XEP_0050(BasePlugin):
         for stanza in iq['command']['substanzas']:
             payload.append(stanza)
 
+        if len(payload) == 1:
+            payload = payload[0]
+
         interfaces = set([item.plugin_attrib for item in payload])
         payload_classes = set([item.__class__ for item in payload])
 

tests/test_stream_xep_0050.py

@@ -35,7 +35,7 @@ class TestAdHocCommands(SleekTest):
             logging.debug(initial)
             new_payload = TestPayload()
             if initial:
-                new_payload['bar'] = 'Received: %s' % initial[0]['bar'] 
+                new_payload['bar'] = 'Received: %s' % initial['bar'] 
             else:
                 new_payload['bar'] = 'Failed'