diff --git a/channels/binding/base.py b/channels/binding/base.py
index f0b2dce..c57fa18 100644
--- a/channels/binding/base.py
+++ b/channels/binding/base.py
@@ -12,7 +12,7 @@ class BindingMetaclass(type):
     """
     Metaclass that tracks instantiations of its type.
     """
-    
+
     register_immediately = False
     binding_classes = []