cli on delete todo, write in Done identified by entire struct so dupes wouldnt but thats ok

cmd/pttodo-cli/cli.go

@@ -167,7 +167,18 @@ func edit(dry bool, filepaths []string) error {
 			return err
 		}
 		original := originals[target]
+
+		newTodoIDs := map[string]struct{}{}
+		for i := range newTodos {
+			newTodoIDs[newTodos[i].ID()] = struct{}{}
+		}
+		for i := range original.Todo {
+			if _, ok := newTodoIDs[original.Todo[i].ID()]; !ok {
+				original.Done = append(original.Done, original.Todo[i])
+			}
+		}
 		original.Todo = newTodos
+
 		original.AutoMove()
 		c, err := yaml.Marshal(original)
 		if err != nil {