Markup block - Gen<None> - 4 - (0:0,0)
    Tag block - Gen<None> - 4 - (0:0,0)
        Markup span - Gen<Markup> - [<br/] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:3
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Text;[br];
            SyntaxKind.ForwardSlash;[/];
