RazorDocument - [0..31)::31 - [<p class=btn" bar="foo"<strong>]
    MarkupBlock - [0..31)::31
        MarkupTagHelperElement - [0..31)::31 - p[StartTagAndEndTag] - ptaghelper
            MarkupTagHelperStartTag - [0..31)::31
                MarkupTextLiteral - [0..2)::2 - [<p] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    OpenAngle;[<];
                    Text;[p];
                MarkupTagHelperAttribute - [2..12)::10 - class - DoubleQuotes - Unbound - [ class=btn]
                    MarkupTextLiteral - [2..3)::1 - [ ] - Gen<Markup> - SpanEditHandler;Accepts:Any
                        Whitespace;[ ];
                    MarkupTextLiteral - [3..8)::5 - [class] - Gen<Markup> - SpanEditHandler;Accepts:Any
                        Text;[class];
                    Equals;[=];
                    MarkupTagHelperAttributeValue - [9..12)::3
                        MarkupLiteralAttributeValue - [9..12)::3 - [btn]
                            MarkupTextLiteral - [9..12)::3 - [btn] - Gen<None> - SpanEditHandler;Accepts:Any
                                Text;[btn];
                MarkupTextLiteral - [12..31)::19 - [" bar="foo"<strong>] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    DoubleQuote;["];
                    Whitespace;[ ];
                    Text;[bar];
                    Equals;[=];
                    DoubleQuote;["];
                    Text;[foo];
                    DoubleQuote;["];
                    OpenAngle;[<];
                    Text;[strong];
                    CloseAngle;[>];
