[docs] [issue11090] Doc errors for unittest in Python 3.1

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

Hm, my patch removes too much.  The part that was mistakenly added by me is the command-line interface doc, but I also removed other parts for things noted with versionadded: 3.2.  Those indications are wrong: They were noted added in 2.7 before r79167 (Ezio).

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nosy: +ezio.melotti

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