Changelog:
============
- correct normalization of "python3.9" to "python" in tests
- Prevent a crash if a value cannot be copied and a UsageError is raised.
- Use the black API directly to format python code.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
