diff --git a/src/doci.xqm b/src/doci.xqm
index d0b21cf..6927fff 100644
--- a/src/doci.xqm
+++ b/src/doci.xqm
@@ -97,29 +97,23 @@ return  if(empty($change?range))
 
               (: string from start line before insert  :)
               let $head:= substring( $doci?lines[$sline+1] ,1, $range?start?character )
-                  =>trace("$head")
-                  
-              (: string from edit end to end of line :)    
+              (: string from edit end to end of line :)
+              let $head:= substring( $doci?lines[$sline+1] ,1, $range?start?character )                                                 
               let $last := substring( $doci?lines[$eline+1] , $range?end?character +1)
-                 =>trace("$last")
 
 let $ulines := (
             subsequence($doci?lines, 1, $sline) (: lines before edit :)
-            =>trace("before")
             ,
             if($sline eq $eline)
             then ($head || $lines[1] || $last) 
             
-            else if(1=count($lines))
-                 then $head || $lines[1] || $last
-                 else ( 
-                       $head || $lines[1],
-                       subsequence( $lines,2, count( $lines - 2)),
-                       $lines[last()] ||$last
-                     ),
+            else (
+                   $head || $lines[1],
+                   subsequence( $lines,2, count( $lines - 2)),
+                   $lines[last()] ||$last
+                 ),
            
              subsequence($doci?lines, $eline+2) (: lines after edit :)
-             =>trace("after")
              )   
 return doci:doci($ulines,$doci?separator)
 };
diff --git a/test/simple.xqm b/test/simple.xqm
index 871646b..89dd7ae 100644
--- a/test/simple.xqm
+++ b/test/simple.xqm
@@ -42,7 +42,7 @@ declare %unit:test function test:update-start() {
   return ()  
 };
 
-(:~ we can update the end of a line :)
+(:~ we can create update from string :)
 declare %unit:test  function test:update-end() {
   let $doc:="a
 123456789
@@ -57,19 +57,6 @@ b"
   return unit:assert-equals($doc,doci:text($update))
 };
 
-(:~ we can update to remove a line :)
-declare %unit:test  function test:update-lines() {
-  let $doc:="a
-123456789
-b"
-  let $doci:= doci:build($doc)
-  let $_:=test:expected($doci,$doc,3)
-  let $change:=test:def-change("",0,1,2,0)
-  let $doci2:=doci:update($doci,$change)
-  let $_:=test:expected($doci2,"ab",1)
-  return true()
-};
-
 (: test $doci properties as expected :)
 declare function test:expected($doci as doci:doci, $doc as xs:string,  $lines as xs:integer){
    unit:assert-equals(doci:lines($doci),$lines),
diff --git a/test/smoke.xq b/test/smoke.xq
index 0c69ab3..0582095 100644
--- a/test/smoke.xq
+++ b/test/smoke.xq
@@ -1,12 +1,22 @@
 import module namespace doci = 'urn:quodatum:text:doci' at "../src/doci.xqm";
-import module namespace test = 'test:doci' at "simple.xqm";
 
 declare variable $long:=
 file:read-text("C:\Users\mrwhe\git\quodatum\basex-lsp\test\sample.docs\pdfbox.xqm");
+declare variable $text:="123456789";
 
-let $doc:="a
-123456789
-b"
+(: create a change description:)
+declare function local:change($text as xs:string,
+                             $sline as xs:integer,$schar as xs:integer,
+                             $eline as xs:integer,$echar as xs:integer
+                             )
+as doci:TextDocumentContentChangeEvent{
+doci:TextDocumentContentChangeEvent(
+            $text,
+            doci:Range(doci:Position($sline,$schar),doci:Position($eline,$echar))
+            )
+};
 
-return doci:build($doc)
-=>doci:update(test:def-change("",0,1,2,0))
\ No newline at end of file
+
+
+doci:build($text)
+=>doci:update(local:change("*",0,0,0,0))
\ No newline at end of file