text instead of empty list

plan/command/delete.go

@@ -88,5 +88,5 @@ func (del Delete) Do(deps Dependencies) (CommandResult, error) {
 type DeleteResult struct{}
 
 func (dr DeleteResult) Render() string {
-	return "task deleted"
+	return "task removed"
 }

plan/command/list.go

@@ -137,6 +137,10 @@ type ListResult struct {
 }
 
 func (lr ListResult) Render() string {
+	if len(lr.Tasks) == 0 {
+		return "\nno tasks to display\n"
+	}
+
 	sort.Slice(lr.Tasks, func(i, j int) bool {
 		if lr.Tasks[i].Task.Date.After(lr.Tasks[j].Task.Date) {
 			return false