internal/bufio/bufio.go
func (w *Writer) WriteString(s string) {
	if w.err != nil {
		return
	}
	w.wr.WriteString(s)
}
func (w *Writer) WriteString(s string) {
	if w.err != nil {
		return
	}
	w.wr.WriteString(s)
}
func ( w * Writer ) WriteString ( s string ) { if w . err != nil { return } w . wr . WriteString ( s ) }
// WriteString writes a string.
WriteString writes a string .