fix spinner.go

cli/spinner/spinner.go

@@ -188,14 +188,17 @@ func (s *Spinner) Finish(info ...string) {
 	}
 	oldLength := utf8.RuneCountInString(s.msg)
 	s.msg = s.joinMsg(info...)
-	newLength := utf8.RuneCountInString(s.msg)
+	gap := oldLength - utf8.RuneCountInString(s.msg)
 	s.run = false
 	close(s.msgCh)
 	s.exit.Lock()
+	if gap < 0 {
+		gap = 0
+	}
 	fmt.Println(
 		str.Join(
 			"\r", s.suffix, green(_SUCCESS), " ", s.msg,
-			strings.Repeat(" ", oldLength-newLength),
+			strings.Repeat(" ", gap),
 		),
 	)
 }
@@ -207,14 +210,17 @@ func (s *Spinner) Abort(info ...string) {
 	}
 	oldLength := utf8.RuneCountInString(s.msg)
 	s.msg = s.joinMsg(info...)
-	newLength := utf8.RuneCountInString(s.msg)
+	gap := oldLength - utf8.RuneCountInString(s.msg)
 	s.run = false
 	close(s.msgCh)
 	s.exit.Lock()
+	if gap < 0 {
+		gap = 0
+	}
 	fmt.Println(
 		str.Join(
 			"\r", s.suffix, red(_FAILURE), " ", s.msg,
-			strings.Repeat(" ", oldLength-newLength),
+			strings.Repeat(" ", gap),
 		),
 	)
 }