[issue12295] Fix ResourceWarning in turtledemo help window

[Éric Araujo]

Changes by Éric Araujo <merwok at netwok.org>:


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resolution:  -> fixed
stage: patch review -> committed/rejected
status: open -> closed
versions: +Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12295>
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