message: Format type_traits.hpp
  Put std::true_type{} on a new line.
diff: @@ -711,7 +711,8 @@ template <class T, class Arg>
  struct can_apply {
  template <class U>
  static auto sfinae(U* x)
  - -> decltype(CAF_IGNORE_UNUSED(x->apply(std::declval<Arg>())), std::true_type{});
  + -> decltype(CAF_IGNORE_UNUSED(x->apply(std::declval<Arg>())),
  + std::true_type{});
  template <class U>
  static auto sfinae(...) -> std::false_type;
  