[docs] [issue16154] Some minor doc fixes in Doc/library

[Chris Jerdonek]

Chris Jerdonek added the comment:

> Trailing blanks are *really* a problem

The NORMALIZE_WHITESPACE doctest directive is another option to deal with cases like these.  It ignores whitespace-only differences between the actual and expected outputs.  Does it pass with that directive?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16154>
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