/// unread unreads the previous read Rune and updates the source position
private void Unread()
{
_buf.UnreadRune();
_srcPos = _prevPos; // put back last position
}
/// unread unreads the previous read Rune and updates the source position
private void Unread()
{
_buf.UnreadRune();
_srcPos = _prevPos; // put back last position
}