Re: [Docutils-develop] I/O uses default encoding argument

[Adam T. <aat...@ou...>]

Attached is a set of five patches rebased on current master -- I have updated the language in the deprecation warnings, used the encoding='locale' backport only for 3.7-3.9 (as 3.10 ``builtins.open`` knows about encoding='locale' natively), and updated the ``io.locale_encoding`` detection mechanism to ignore ``-X utf8``, as the system locale encoding doesn't change for the Python UTF-8 mode.

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