fix outpt exist code

Author: yangzong18

lib/cp.go

@@ -2415,9 +2415,6 @@ func (cc *CopyCommand) downloadFiles(srcURL CloudURL, destURL FileURL) error {
 func (cc *CopyCommand) formatResultPrompt(err error) error {
 	cc.closeProgress()
 	fmt.Printf(cc.monitor.progressBar(true, normalExit))
-	if err != nil && cc.cpOption.ctnu {
-		return nil
-	}
 	return err
 }
 
@@ -2895,9 +2892,7 @@ func (cc *CopyCommand) waitRoutinueComplete(chError, chListError <-chan error, o
 			} else {
 				ferr = err
 				if !cc.cpOption.ctnu {
-					cc.closeProgress()
-					fmt.Printf(cc.monitor.progressBar(true, errExit))
-					return err
+					return cc.formatResultPrompt(ferr)
 				}
 			}
 		}

lib/cp_test.go

@@ -4665,7 +4665,7 @@ func (s *OssutilCommandSuite) TestDownLoadWithoutDisableIgnoreError(c *C) {
 
 	// download
 	_, err = cm.RunCommand("cp", cpArgs, options)
-	c.Assert(err, IsNil)
+	c.Assert(err, NotNil)
 
 	// check,success download 2 file
 	// exist