return (Charset ? Charset : "us-ascii");
if ((Charset == NULL || strcasecmp (Charset, "us-ascii") == 0) && info->hibin) return ("unknown-8bit");  if (((cs = mutt_get_charset (Charset)) && cs->map) ? info->nonasc : info->hibin) return (Charset);  return ("us-ascii");
static char *set_text_charset (CONTENT *info){  if (strcasecmp (NONULL (Charset), "us-ascii") == 0)  {    if (info->hibin != 0)      return "unknown-8bit";  }  else if (info->hibin == 0)    return "us-ascii";  /* if no charset is given, provide a reasonable default */  return (Charset ? Charset : "us-ascii");}