[issue16641] sched.scheduler.enter arguments should not be modifiable

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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title: sched.scheduler.enter arguments should be modifiable -> sched.scheduler.enter arguments should not be modifiable

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16641>
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