Update changelog and disable internal

include/fmt/core.h

@@ -332,7 +332,9 @@ enum char8_type : unsigned char {};
 #endif
 }  // namespace detail
 
+#ifdef FMT_USE_INTERNAL
 namespace internal = detail;  // DEPRECATED
+#endif
 
 /**
   An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
@@ -1592,7 +1594,7 @@ class dynamic_format_arg_store
   void clear() {
     data_.clear();
     named_info_.clear();
-    dynamic_args_ = internal::dynamic_arg_list();
+    dynamic_args_ = detail::dynamic_arg_list();
   }
 
   /**

include/fmt/format-inl.h

@@ -1373,7 +1373,7 @@ struct stringifier {
   }
   std::string operator()(basic_format_arg<format_context>::handle h) const {
     memory_buffer buf;
-    internal::buffer<char>& base = buf;
+    detail::buffer<char>& base = buf;
     format_parse_context parse_ctx({});
     format_context format_ctx(std::back_inserter(base), {}, {});
     h.format(parse_ctx, format_ctx);