public void Control_codes_with_nonequivalent_content_are_not_equal()
        {
            var one = new AnsiControlCode($"{Ansi.Esc}[s");
            var two = new AnsiControlCode($"{Ansi.Esc}[u");

            one.Equals(two).Should().BeFalse();
        }
        public void Control_codes_with_equivalent_content_are_equal()
        {
            var one = new AnsiControlCode($"{Ansi.Esc}[s");
            var two = new AnsiControlCode($"{Ansi.Esc}[s");

            one.Equals(two).Should().BeTrue();

            one.Invoking(code => code.Equals(null)).Should().NotThrow <NullReferenceException>();
        }