diff --git a/src/branch_tier.hpp b/src/branch_tier.hpp
index 352584d9..30af930a 100644
--- a/src/branch_tier.hpp
+++ b/src/branch_tier.hpp
@@ -18,7 +18,6 @@ public:
 public:
   std::vector<Branch2>::iterator begin() { return _branches.begin(); }
   std::vector<Branch2>::iterator end() { return _branches.end(); }
-
   std::vector<Branch2>::const_iterator begin() const { return _branches.begin(); }
   std::vector<Branch2>::const_iterator end() const { return _branches.end(); }