remove self::node from preText in case of a retrace, see E3 7r

modules/fontane/transform.xqm

@@ -1147,7 +1147,7 @@ as element(xhtml:span){
           then ()
           else 'hoverTop'
         },
-        local:preText($retrace),
+        let $pre := local:preText($retrace) return if($pre = $retrace//text()) then () else $pre,
 
         element xhtml:span {
             attribute class {'italic'},