Markup block - Gen<None> - 8 - (0:0,0)
    Tag block - Gen<TagHelper> - 8 - (0:0,0) - p - PTagHelper
        StartTagAndEndTag - <p> ... </p>
        Tag block - Gen<None> - 1 - (3:0,3)
            Markup span - Gen<Markup> - [<] - SpanEditHandler;Accepts:Any - (3:0,3) - Tokens:1
                HtmlTokenType.OpenAngle;[<];
