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Docs: Clarify the before_and_after() example (GH-28458) (#28464)

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(cherry picked from commit fcbf9b176b)

Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>

Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>
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Miss Islington (bot) 2021-09-19 18:53:37 -07:00 • committed by GitHub
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2 changed files with 8 additions and 6 deletions
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7
Lib/test/test_itertools.py
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@ -2605,10 +2605,11 @@ def test_permutations_sizeof(self):
>>> list(odds)
[1, 3, 5, 7, 9]
>>> all_upper, remainder = before_and_after(str.isupper, 'ABCdEfGhI')
>>> str.join('', all_upper)
>>> it = iter('ABCdEfGhI')
>>> all_upper, remainder = before_and_after(str.isupper, it)
>>> ''.join(all_upper)
'ABC'
>>> str.join('', remainder)
>>> ''.join(remainder)
'dEfGhI'
>>> list(powerset([1,2,3]))