#8473: make doctest.testfile use universal newline mode.

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branch : 2.7
Fix a few typo/grammar issues in the multiprocessing docs.

Reported by Scott Hinton on docs@.

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branch : 2.7
 - Add CVE number for Issue #21831

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branch : 2.7
also use openssl envvars to find certs on windows (closes #22449)

Patch by Christian Heimes and Alex Gaynor.

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branch : 2.7
extra : amend_source : c6767419609bdfa9ff43449ce64eb7320f560f3b
separate cert loading tests into Windows and non-Windows cases

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branch : 2.7
#14056: Small improvements to the tarfile documentation.

Patch by Éric Araujo with help from Lars Gustäbel.

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branch : 2.7