Markup block - Gen<None> - 18 - (0:0,0)
    Tag block - Gen<None> - 5 - (0:0,0)
        Markup span - Gen<Markup> - [<foo>] - SpanEditHandler;Accepts:None - (0:0,0) - Tokens:3
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Text;[foo];
            SyntaxKind.CloseAngle;[>];
    Tag block - Gen<None> - 7 - (5:0,5)
        Markup span - Gen<Markup> - [<bar />] - SpanEditHandler;Accepts:None - (5:0,5) - Tokens:5
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Text;[bar];
            SyntaxKind.Whitespace;[ ];
            SyntaxKind.ForwardSlash;[/];
            SyntaxKind.CloseAngle;[>];
    Tag block - Gen<None> - 6 - (12:0,12)
        Markup span - Gen<Markup> - [</foo>] - SpanEditHandler;Accepts:None - (12:0,12) - Tokens:4
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.ForwardSlash;[/];
            SyntaxKind.Text;[foo];
            SyntaxKind.CloseAngle;[>];
