Markup block - Gen<None> - 6 - (0:0,0)
    Tag block - Gen<None> - 2 - (0:0,0)
        Markup span - Gen<Markup> - [<>] - SpanEditHandler;Accepts:None - (0:0,0) - Symbols:2
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.CloseAngle;[>];
    Tag block - Gen<None> - 3 - (2:0,2)
        Markup span - Gen<Markup> - [</>] - SpanEditHandler;Accepts:None - (2:0,2) - Symbols:3
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.CloseAngle;[>];
    Markup span - Gen<Markup> - [ ] - SpanEditHandler;Accepts:None - (5:0,5) - Symbols:1
        HtmlSymbolType.WhiteSpace;[ ];
