check('未变化的保存文件没有列入新增', '保存文件' not in output['added'] and '保存文件' in output['unchanged'])
(folder / 'update-checklist.md').write_text('# 新增\n' + '\n'.join('- ' + value for value in output['added']) + '\n\n# 改写\n' + '\n'.join('- ' + row['old'] + ' → ' + row['new'] for row in output['changed']))
