Markup block - Gen<None> - 19 - (0:0,0)
    Tag block - Gen<None> - 14 - (0:0,0)
        Markup span - Gen<Markup> - [<] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:1
            HtmlTokenType.OpenAngle;[<];
        Markup block - Gen<Attr:class, class="@(1:0,1),"@(12:0,12)> - 12 - (1:0,1)
            Markup span - Gen<None> - [ class="] - SpanEditHandler;Accepts:Any - (1:0,1) - Tokens:4
                HtmlTokenType.WhiteSpace;[ ];
                HtmlTokenType.Text;[class];
                HtmlTokenType.Equals;[=];
                HtmlTokenType.DoubleQuote;["];
            Markup span - Gen<LitAttr:@(9:0,9)> - [foo] - SpanEditHandler;Accepts:Any - (9:0,9) - Tokens:1
                HtmlTokenType.Text;[foo];
            Markup span - Gen<None> - ["] - SpanEditHandler;Accepts:Any - (12:0,12) - Tokens:1
                HtmlTokenType.DoubleQuote;["];
        Markup span - Gen<Markup> - [ ] - SpanEditHandler;Accepts:Any - (13:0,13) - Tokens:1
            HtmlTokenType.WhiteSpace;[ ];
    Tag block - Gen<TagHelper> - 5 - (14:0,14) - p - ptaghelper
        SelfClosing - <p />
