Argcomplete

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- setup.py -> pyproject.toml migration start (427)

- Improve user install logic in activate-global-python-argcomplete
(437)

- Ensure Python 3.7 compatibility in check_console_script (436)

- ZSH implementation fixes (431, 433)

- Documentation improvements

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- Test suite shell wrapper: Accept OSError on exit

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- Test suite: Use general regex to cut zsh reset ANSI sequences (425)

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- Allow importlib-metadata 6.x; skip test failures on Python 3.7 (420,
424)

- Note completers can return iterables of strings, not just lists
(422)

- Documentation and test improvements

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- Call \_default as fallback in zsh global completion hook

- Begin support for mapping-emitting completers

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- activate-global-python-argcomplete: do not overwrite existing dotfile
in user directory

- Add NOTICE file

- Establish long term name for split_line as
argcomplete.lexers.split_line