Markup block - Gen<None> - 28 - (0:0,0)
    Tag block - Gen<None> - 21 - (0:0,0)
        Markup span - Gen<Markup> - [<span] - SpanEditHandler;Accepts:Any - (0:0,0) - Symbols:2
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.Text;[span];
        Markup block - Gen<None> - 14 - (5:0,5)
            Markup span - Gen<Markup> - [ data-foo=] - SpanEditHandler;Accepts:Any - (5:0,5) - Symbols:3
                HtmlSymbolType.WhiteSpace;[ ];
                HtmlSymbolType.Text;[data-foo];
                HtmlSymbolType.Equals;[=];
            Expression block - Gen<Expr> - 4 - (15:0,15)
                Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (15:0,15) - Symbols:1
                    CSharpSymbolType.Transition;[@];
                Code span - Gen<Expr> - [foo] - ImplicitExpressionEditHandler;Accepts:NonWhiteSpace;ImplicitExpression[RTD];K14 - (16:0,16) - Symbols:1
                    CSharpSymbolType.Identifier;[foo];
        Markup span - Gen<Markup> - [ >] - SpanEditHandler;Accepts:Any - (19:0,19) - Symbols:2
            HtmlSymbolType.WhiteSpace;[ ];
            HtmlSymbolType.CloseAngle;[>];
    Tag block - Gen<None> - 7 - (21:0,21)
        Markup span - Gen<Markup> - [</span>] - SpanEditHandler;Accepts:Any - (21:0,21) - Symbols:4
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.Text;[span];
            HtmlSymbolType.CloseAngle;[>];
