[docs] [issue22170] Typo in iterator doc

[Roundup Robot]

Roundup Robot added the comment:

New changeset 35db84720d8d by Ezio Melotti in branch '3.4':
#22170: avoid printing newlines twice in tutorial example.
http://hg.python.org/cpython/rev/35db84720d8d

New changeset 79e469ae13b7 by Ezio Melotti in branch 'default':
#22170: merge with 3.4.
http://hg.python.org/cpython/rev/79e469ae13b7

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nosy: +python-dev

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<http://bugs.python.org/issue22170>
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