diff --git a/src/flow/binary.rs b/src/flow/binary.rs
index 7263bf5..394e2a1 100644
--- a/src/flow/binary.rs
+++ b/src/flow/binary.rs
@@ -13,6 +13,7 @@ pub type Split<BT> = (
     <BT as BinaryTrees>::Tree,
     <BT as BinaryTrees>::Key,
 );
+
 pub type KeySplit<BT> = (<BT as BinaryTrees>::Tree, <BT as BinaryTrees>::Tree);
 
 pub type BTWrap<'a, BT, A> = WrapC<'a, A, BT>;