public void Clear_TwoRunBldr_ClearsState()
{
TsStrBldr tsb = CreateMixedWSBldr();
tsb.Clear();
Assert.That(tsb.Text, Is.Null);
Assert.That(tsb.RunCount, Is.EqualTo(1));
Assert.That(GetWS(tsb, 0), Is.EqualTo(-1));
}