Markup block - Gen<None> - 17 - (0:0,0)
    Tag block - Gen<None> - 17 - (0:0,0)
        Markup span - Gen<Markup> - [<span] - SpanEditHandler;Accepts:Any - (0:0,0) - Symbols:2
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.Text;[span];
        Markup block - Gen<Attr:foo, foo='@(5:0,5),'@(13:0,13)> - 9 - (5:0,5)
            Markup span - Gen<None> - [ foo='] - SpanEditHandler;Accepts:Any - (5:0,5) - Symbols:4
                HtmlSymbolType.WhiteSpace;[ ];
                HtmlSymbolType.Text;[foo];
                HtmlSymbolType.Equals;[=];
                HtmlSymbolType.SingleQuote;['];
            Markup block - Gen<None> - 2 - (11:0,11)
                Markup span - Gen<LitAttr:@(11:0,11)> - [@] - SpanEditHandler;Accepts:None - (11:0,11) - Symbols:1
                    HtmlSymbolType.Transition;[@];
                Markup span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (12:0,12) - Symbols:1
                    HtmlSymbolType.Transition;[@];
            Markup span - Gen<None> - ['] - SpanEditHandler;Accepts:Any - (13:0,13) - Symbols:1
                HtmlSymbolType.SingleQuote;['];
        Markup span - Gen<Markup> - [ />] - SpanEditHandler;Accepts:Any - (14:0,14) - Symbols:3
            HtmlSymbolType.WhiteSpace;[ ];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.CloseAngle;[>];
