public void TestCopyToExtractsCorrectCharacters()
{
var builder = new ColoredMultistringBuilder();
builder.Append(anyArrayOfMultipleColoredStrings);
char[] buffer = new char[8];
for (var i = 0; i < buffer.Length; ++i)
{
buffer[i] = ' ';
}
builder.CopyTo(1, buffer, 3, 5);
buffer.Should().Equal(new[] { ' ', ' ', ' ', 'e', 'l', 'l', 'o', ':', });
}