Markup block - Gen<None> - 31 - (0:0,0)
    Tag block - Gen<None> - 5 - (0:0,0)
        Markup span - Gen<Markup> - [<foo>] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:3
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Text;[foo];
            SyntaxKind.CloseAngle;[>];
    HtmlComment block - Gen<None> - 20 - (5:0,5)
        Markup span - Gen<Markup> - [<!--] - SpanEditHandler;Accepts:None - (5:0,5) - Tokens:3
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Bang;[!];
            SyntaxKind.DoubleHyphen;[--];
        Markup span - Gen<Markup> - [ Hello World ] - SpanEditHandler;Accepts:Whitespace - (9:0,9) - Tokens:5
            SyntaxKind.Whitespace;[ ];
            SyntaxKind.Text;[Hello];
            SyntaxKind.Whitespace;[ ];
            SyntaxKind.Text;[World];
            SyntaxKind.Whitespace;[ ];
        Markup span - Gen<Markup> - [-->] - SpanEditHandler;Accepts:None - (22:0,22) - Tokens:2
            SyntaxKind.DoubleHyphen;[--];
            SyntaxKind.CloseAngle;[>];
    Tag block - Gen<None> - 6 - (25:0,25)
        Markup span - Gen<Markup> - [</foo>] - SpanEditHandler;Accepts:Any - (25:0,25) - Tokens:4
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.ForwardSlash;[/];
            SyntaxKind.Text;[foo];
            SyntaxKind.CloseAngle;[>];
