public static void MarkdownFormat_GetHashCode_NotEqual()
        {
            MarkdownFormat format  = CreateMarkdownFormat();
            MarkdownFormat format2 = format.Modify();

            Assert.NotEqual(format.GetHashCode(), format2.GetHashCode());
        }
        public static void MarkdownFormat_GetHashCode_Equal()
        {
            MarkdownFormat format = CreateMarkdownFormat();

            Assert.Equal(format.GetHashCode(), format.GetHashCode());
        }