[docs] [issue28315] incorrect "in ?" output in 'divide' example at "Defining Clean-up Actions" in tutorial

[Mariatta Wijaya]

Changes by Mariatta Wijaya <mariatta.wijaya at gmail.com>:


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pull_requests: +1545

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28315>
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