>> 
>>   if (!auto_saving && !noninteractive)
>>     Fmessage (build_string ("%s %d characters of %s"),
>>               build_string (NUMBERP (append) ? "Updated"
>>                             : ! NILP (append) ? "Added"
>>                             : "Wrote"),
>>               make_number (XINT (end) - XINT (start)),
>>               visit_file);
>
> Yes, this is also okay.

Except I forgot the CALLN.