diff --git a/channels/binding/base.py b/channels/binding/base.py
index f7a8984..dc0f78a 100644
--- a/channels/binding/base.py
+++ b/channels/binding/base.py
@@ -88,7 +88,7 @@ class Binding(object):
         Entry point for triggering the binding from save signals.
         """
         cls.trigger_outbound(instance, "delete")
-    
+
     @classmethod
     def encode(cls, stream, payload):
         """