* Insert unittest import line if it doesn't exist
* Complement upgrade-pylib Claude Code command
* Ensure test module having import statement at least one
* Use `ast.unparse` for decorator generation and every ut_method
* Ensure ut_method type for external patches
* use textwrap
* Apply patches to `test_os.py`
* Apoly on `test_xml_etree.py`
* Run on some test files
* Update `test_str.py`
* Update `test_logging.py` from 3.13.7