Markup block - Gen<None> - 16 - (0:0,0)
    Tag block - Gen<None> - 5 - (0:0,0)
        Markup span - Gen<Markup> - [<foo>] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:3
            HtmlTokenType.OpenAngle;[<];
            HtmlTokenType.Text;[foo];
            HtmlTokenType.CloseAngle;[>];
    Markup span - Gen<None> - [@] - SpanEditHandler;Accepts:Any - (5:0,5) - Tokens:1
        HtmlTokenType.Transition;[@];
    Markup span - Gen<Markup> - [@bar] - SpanEditHandler;Accepts:Any - (6:0,6) - Tokens:2
        HtmlTokenType.Transition;[@];
        HtmlTokenType.Text;[bar];
    Tag block - Gen<None> - 6 - (10:0,10)
        Markup span - Gen<Markup> - [</foo>] - SpanEditHandler;Accepts:Any - (10:0,10) - Tokens:4
            HtmlTokenType.OpenAngle;[<];
            HtmlTokenType.ForwardSlash;[/];
            HtmlTokenType.Text;[foo];
            HtmlTokenType.CloseAngle;[>];
