MarkupBlock - [0..26)::26 - [<1-foo+bar>foo</1-foo+bar>]
    MarkupTagBlock - [0..11)::11 - [<1-foo+bar>]
        MarkupTextLiteral - [0..11)::11 - [<1-foo+bar>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            Text;[1-foo+bar];
            CloseAngle;[>];
    MarkupTextLiteral - [11..14)::3 - [foo] - Gen<Markup> - SpanEditHandler;Accepts:Any
        Text;[foo];
    MarkupTagBlock - [14..26)::12 - [</1-foo+bar>]
        MarkupTextLiteral - [14..26)::12 - [</1-foo+bar>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            ForwardSlash;[/];
            Text;[1-foo+bar];
            CloseAngle;[>];
