RazorDocument - [0..3)::3 - [<!p]
    MarkupBlock - [0..3)::3
        MarkupTagBlock - [0..3)::3 - [<!p]
            MarkupTextLiteral - [0..1)::1 - [<] - Gen<Markup> - SpanEditHandler;Accepts:Any
                OpenAngle;[<];
            RazorMetaCode - [1..2)::1 - Gen<None> - SpanEditHandler;Accepts:None
                Bang;[!];
            MarkupTextLiteral - [2..3)::1 - [p] - Gen<Markup> - SpanEditHandler;Accepts:Any
                Text;[p];
