🚨 fixed warnings

include/nlohmann/detail/iterators/iteration_proxy.hpp

@@ -167,4 +167,4 @@ class tuple_element<N, ::nlohmann::detail::iteration_proxy_value<IteratorType >>
 #if defined(__clang__)
     #pragma clang diagnostic pop
 #endif
-}
+} // namespace std

include/nlohmann/detail/iterators/iterator_traits.hpp

@@ -45,5 +45,5 @@ struct iterator_traits<T*, enable_if_t<std::is_object<T>::value>> {
   using pointer = T*;
   using reference = T&;
 };
-}
-}
+} // namespace detail
+} // namespace nlohmann