internal/bufio/bufio.go
func (w *Writer) WriteStringCesu8(s string) int {
	return w.WriteCesu8([]byte(s))
}
func (w *Writer) WriteStringCesu8(s string) int {
	return w.WriteCesu8([]byte(s))
}
// WriteStringCesu8 is like WriteCesu8 with an UTF-8 string as parameter.