Markup block - Gen<None> - 18 - (0:0,0)
    Tag block - Gen<None> - 5 - (0:0,0)
        Markup span - Gen<Markup> - [<foo>] - SpanEditHandler;Accepts:None - (0:0,0) - Symbols:3
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.Text;[foo];
            HtmlSymbolType.CloseAngle;[>];
    Tag block - Gen<None> - 13 - (5:0,5)
        Markup span - Gen<Markup> - [</!-- bar -->] - SpanEditHandler;Accepts:None - (5:0,5) - Symbols:9
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.Bang;[!];
            HtmlSymbolType.DoubleHyphen;[--];
            HtmlSymbolType.WhiteSpace;[ ];
            HtmlSymbolType.Text;[bar];
            HtmlSymbolType.WhiteSpace;[ ];
            HtmlSymbolType.DoubleHyphen;[--];
            HtmlSymbolType.CloseAngle;[>];
