[docs] [issue21221] Minor struct_time documentation bug

[Roundup Robot]

Roundup Robot added the comment:

New changeset fae779a811ec by Senthil Kumaran in branch '3.4':
Issue21221 - Explain the usage of tm_isdst attribute of mktime, with valid
https://hg.python.org/cpython/rev/fae779a811ec

New changeset 3b7a7ea1214c by Senthil Kumaran in branch '3.5':
merge from 3.4
https://hg.python.org/cpython/rev/3b7a7ea1214c

New changeset b729e7ae2747 by Senthil Kumaran in branch 'default':
merge from 3.5
https://hg.python.org/cpython/rev/b729e7ae2747

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21221>
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