Markup block - Gen<None> - 11 - (0:0,0)
    Tag block - Gen<None> - 3 - (0:0,0)
        Markup span - Gen<Markup> - [<p>] - SpanEditHandler;Accepts:None - (0:0,0) - Tokens:3
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Text;[p];
            SyntaxKind.CloseAngle;[>];
    Markup span - Gen<Markup> - [Foo] - SpanEditHandler;Accepts:Any - (3:0,3) - Tokens:1
        SyntaxKind.Text;[Foo];
    Tag block - Gen<None> - 4 - (6:0,6)
        Markup span - Gen<Markup> - [</p>] - SpanEditHandler;Accepts:None - (6:0,6) - Tokens:4
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.ForwardSlash;[/];
            SyntaxKind.Text;[p];
            SyntaxKind.CloseAngle;[>];
    Markup span - Gen<Markup> - [ ] - SpanEditHandler;Accepts:None - (10:0,10) - Tokens:1
        SyntaxKind.Whitespace;[ ];
