Setuptools

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Deprecations
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* 2620: The ``license_file`` option is now marked as deprecated.
Use ``license_files`` instead. -- by :user:`cdce8p`

Breaking Changes
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* 2620: If neither ``license_file`` nor ``license_files`` is specified, the ``sdist``
option will now auto-include files that match the following patterns:
``LICEN[CS]E*``, ``COPYING*``, ``NOTICE*``, ``AUTHORS*``.
This matches the behavior of ``bdist_wheel``. -- by :user:`cdce8p`

Changes
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* 2620: The ``license_file`` and ``license_files`` options now support glob patterns. -- by :user:`cdce8p`
* 2632: Implemented ``VendorImporter.find_spec()`` method to get rid
of ``ImportWarning`` that Python 3.10 emits when only the old-style
importer hooks are present -- by :user:`webknjaz`

Documentation changes
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* 2620: Added documentation for the ``license_files`` option. -- by :user:`cdce8p`

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Breaking Changes
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* 2566: Remove the deprecated ``bdist_wininst`` command. Binary packages should be built as wheels instead. -- by :user:`hroncok`

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Changes
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* 2608: Added informative error message to PEP 517 build failures owing to
an empty ``setup.py`` -- by :user:`layday`

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No significant changes.

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Misc
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* 2595: Reduced scope of dash deprecation warning to Setuptools/distutils only -- by :user:`melissa-kun-li`

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Documentation changes
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* 2584: Added ``sphinx-inline-tabs`` extension to allow for comparison of ``setup.py`` and its equivalent ``setup.cfg`` -- by :user:`amy-lei`

Misc
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* 2592: Made option keys in the ``[metadata]`` section of ``setup.cfg`` case-sensitive. Users having
uppercase option spellings will get a warning suggesting to make them to lowercase
-- by :user:`melissa-kun-li`