RazorDocument - [0..14)::14 - [<!p class="btn]
    MarkupBlock - [0..14)::14
        MarkupTagBlock - [0..14)::14 - [<!p class="btn]
            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];
            MarkupAttributeBlock - [3..14)::11 - [ class="btn]
                MarkupTextLiteral - [3..4)::1 - [ ] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    Whitespace;[ ];
                MarkupTextLiteral - [4..9)::5 - [class] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    Text;[class];
                Equals;[=];
                MarkupTextLiteral - [10..11)::1 - ["] - Gen<None> - SpanEditHandler;Accepts:Any
                    DoubleQuote;["];
                GenericBlock - [11..14)::3
                    MarkupLiteralAttributeValue - [11..14)::3 - [btn]
                        MarkupTextLiteral - [11..14)::3 - [btn] - Gen<Markup> - SpanEditHandler;Accepts:Any
                            Text;[btn];
