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bpo-13601: Mention stderr's line buffering in What's New #20168

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miss-islington merged 1 commit into from
May 18, 2020
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bpo-13601: Mention stderr's line buffering in What's New #20168

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4 changes: 4 additions & 0 deletions Doc/whatsnew/3.9.rst
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Expand Up @@ -542,6 +542,10 @@ most platforms. On Fedora and SuSE, it is equal to ``"lib64"`` on 64-bit
platforms.
(Contributed by Jan Matějek, Matěj Cepl, Charalampos Stratakis and Victor Stinner in :issue:`1294959`.)

Previously, :attr:`sys.stderr` was block-buffered when non-interactive. Now
``stderr`` defaults to always being line-buffered.
(Contributed by Jendrik Seipp in :issue:`13601`.)


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