diff --git a/src/flow/traversible/unbalanced.rs b/src/flow/traversible/unbalanced.rs
index f42ae0f..24ebcfa 100644
--- a/src/flow/traversible/unbalanced.rs
+++ b/src/flow/traversible/unbalanced.rs
@@ -1,5 +1,5 @@
 //! Binary trees without balancing.
-//! 
+//!
 //! Intended for testing.
 
 use std::fmt::Display;