8.1.8

This is the Click 8.1.8 fix release, which fixes bugs but does not otherwise change behavior and should not result in breaking changes compared to the latest feature release.

PyPI: https://pypi.org/project/click/8.1.8/
Changes: https://click.palletsprojects.com/en/stable/changes/#version-8-1-8
Milestone https://github.com/pallets/click/milestones/23?closed=1

• Fix an issue with type hints for click.open_file(). #2717
• Fix issue where error message for invalid click.Path displays on
  multiple lines. #2697
• Fixed issue that prevented a default value of "" from being displayed in
  the help for an option. #2500
• The test runner handles stripping color consistently on Windows. #2705
• Show correct value for flag default when using default_map. #2632
• Fix click.echo(color=...) passing color to coloroma so it can be
  forced on Windows. #2606.
• More robust bash version check, fixing problem on Windows with git-bash. #2638
• Cache the help option generated by the help_option_names setting to
  respect its eagerness. #2811
• Replace uses of os.system with subprocess.Popen. #1476
• Exceptions generated during a command will use the context's color
  setting when being displayed. #2193
• Error message when defining option with invalid name is more descriptive. #2452
• Refactor code generating default --help option to deduplicate code. #2563
• Test CLIRunner resets patched _compat.should_strip_ansi. #2732