public void Add_2()
{
var spanner = new StringSource("hey there");
var sub = spanner.Substring(new Range(4, 8));
var sub2 = spanner.Substring(new Range(3, 8));
var sub3 = spanner.Substring(new Range(0, 2));
spanner.TrimStart(' ');
spanner.ToString().Should().Be("hey there");
sub.Deleted.Should().BeFalse();
sub.ToString().Should().Be("there");
sub2.ToString().Should().Be(" there");
sub3.Deleted.Should().BeFalse();
sub3.ToString().Should().Be("hey");
spanner.Add(" boy");
spanner.ToString().Should().Be("hey there boy");
sub.Deleted.Should().BeFalse();
sub.ToString().Should().Be("there");
sub2.ToString().Should().Be(" there");
sub3.Deleted.Should().BeFalse();
sub3.ToString().Should().Be("hey");
}
