[issue24746] doctest 'fancy diff' formats incorrectly strip trailing whitespace

[Sanyam Khurana]

Change by Sanyam Khurana <sanyam.khurana01 at gmail.com>:


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pull_requests: +9886
stage: test needed -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue24746>
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