Markup block - Gen<None> - 24 - (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;[>];
    HtmlComment block - Gen<None> - 13 - (5:0,5)
        Markup span - Gen<Markup> - [<!--] - SpanEditHandler;Accepts:None - (5:0,5) - Symbols:3
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.Bang;[!];
            HtmlSymbolType.DoubleHyphen;[--];
        Markup span - Gen<Markup> - [ ] - SpanEditHandler;Accepts:WhiteSpace - (9:0,9) - Symbols:1
            HtmlSymbolType.WhiteSpace;[ ];
        Expression block - Gen<Expr> - 4 - (10:0,10)
            Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (10:0,10) - Symbols:1
                CSharpSymbolType.Transition;[@];
            Code span - Gen<Expr> - [foo] - ImplicitExpressionEditHandler;Accepts:NonWhiteSpace;ImplicitExpression[RTD];K14 - (11:0,11) - Symbols:1
                CSharpSymbolType.Identifier;[foo];
        Markup span - Gen<Markup> - [ ] - SpanEditHandler;Accepts:WhiteSpace - (14:0,14) - Symbols:1
            HtmlSymbolType.WhiteSpace;[ ];
        Markup span - Gen<Markup> - [-->] - SpanEditHandler;Accepts:None - (15:0,15) - Symbols:2
            HtmlSymbolType.DoubleHyphen;[--];
            HtmlSymbolType.CloseAngle;[>];
    Tag block - Gen<None> - 6 - (18:0,18)
        Markup span - Gen<Markup> - [</foo>] - SpanEditHandler;Accepts:None - (18:0,18) - Symbols:4
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.Text;[foo];
            HtmlSymbolType.CloseAngle;[>];
