MarkupBlock - [0..31)::31 - [<foo>anurse@microsoft.com</foo>]
    MarkupTagBlock - [0..5)::5 - [<foo>]
        MarkupTextLiteral - [0..5)::5 - [<foo>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            Text;[foo];
            CloseAngle;[>];
    MarkupTextLiteral - [5..25)::20 - [anurse@microsoft.com] - Gen<Markup> - SpanEditHandler;Accepts:Any
        Text;[anurse@microsoft.com];
    MarkupTagBlock - [25..31)::6 - [</foo>]
        MarkupTextLiteral - [25..31)::6 - [</foo>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            ForwardSlash;[/];
            Text;[foo];
            CloseAngle;[>];
