[issue23921] Standardize documentation whitespace, formatting

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Addressed Martin's Georg's and my comments, resolved conflicts, stripped trailing spaces, backported to 2.7.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 2.7

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<http://bugs.python.org/issue23921>
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