message: Fix overly strict overload resolution
diff: @@ -168,7 +168,7 @@ public:
  }
  template <class T>
  - enable_if_t<is_list_like<T>::value
  + enable_if_t<is_iterable<T>::value && !is_map_like<T>::value
  && !is_inspectable<stringification_inspector, T>::value
  && !std::is_convertible<T, string_view>::value
  && !has_to_string<T>::value>
  