Format with clang-format 10
diff --git a/include/cxx.h b/include/cxx.h
index ab03f32..575ec77 100644
--- a/include/cxx.h
+++ b/include/cxx.h
@@ -554,6 +554,7 @@
 class Box<T>::allocation {
   static T *alloc() noexcept;
   static void dealloc(T *) noexcept;
+
 public:
   allocation() noexcept : ptr(alloc()) {}
   ~allocation() noexcept {