formatted, commentje

binary_output/binary_output.hpp

@@ -27,6 +27,7 @@ std::ostream& operator<<(std::ostream& out, binary<T> const& rhs){
 }
 
 // Array
+// NOTE: it uses references...
 template <typename T, size_t N>
 struct binary_arr {
 	T const(& thing)[N];