in byteview.go [163:175]
func (v ByteView) WriteTo(w io.Writer) (n int64, err error) {
var m int
if v.b != nil {
m, err = w.Write(v.b)
} else {
m, err = io.WriteString(w, v.s)
}
if err == nil && m < v.Len() {
err = io.ErrShortWrite
}
n = int64(m)
return
}