[issue11633] Document that print may need explicit flushing

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 4a767054551b by Terry Jan Reedy in branch '3.2':
#11633 At least 2 people prefer earlier revision.
http://hg.python.org/cpython/rev/4a767054551b

New changeset 22688f5f9d0f by Terry Jan Reedy in branch 'default':
Merge #11633 At least 2 people prefer earlier revision.
http://hg.python.org/cpython/rev/22688f5f9d0f

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11633>
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