parse/line.go
func (l Lines) Bytes() []byte {
	var lines [][]byte
	for _, line := range l {
		lines = append(lines, line.Bytes)
	}
	return bytes.Join(lines, []byte("\n"))
}
func (l Lines) Bytes() []byte {
	var lines [][]byte
	for _, line := range l {
		lines = append(lines, line.Bytes)
	}
	return bytes.Join(lines, []byte("\n"))
}
// Bytes gets the joined bytes of all lines.