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