Markup block - Gen<None> - 11 - (0:0,0)
    Tag block - Gen<None> - 3 - (0:0,0)
        Markup span - Gen<Markup> - [<p>] - SpanEditHandler;Accepts:None - (0:0,0) - Symbols:3
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.Text;[p];
            HtmlSymbolType.CloseAngle;[>];
    Markup span - Gen<Markup> - [Foo] - SpanEditHandler;Accepts:Any - (3:0,3) - Symbols:1
        HtmlSymbolType.Text;[Foo];
    Tag block - Gen<None> - 4 - (6:0,6)
        Markup span - Gen<Markup> - [</p>] - SpanEditHandler;Accepts:None - (6:0,6) - Symbols:4
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.Text;[p];
            HtmlSymbolType.CloseAngle;[>];
    Markup span - Gen<Markup> - [ ] - SpanEditHandler;Accepts:None - (10:0,10) - Symbols:1
        HtmlSymbolType.WhiteSpace;[ ];
