Mark print line as DEBUG

This debug line spams unit tests for comms.
Be sure to note for easy location for later removal.

evennia/comms/models.py

@@ -527,7 +527,7 @@ class SubscriptionHandler(object):
         for subscriber in make_iter(entity):
             if subscriber:
                 clsname = subscriber.__dbclass__.__name__
-                print("subscriber:", subscriber, clsname)
+                print("subscriber:", subscriber, clsname)  # DEBUG
                 # chooses the right type
                 if clsname == "ObjectDB":
                     self.obj.db_object_subscriptions.add(subscriber)