[issue21557] [doc] os.popen & os.system lack shell-related security warnings

[Irit Katriel]

Change by Irit Katriel <iritkatriel at gmail.com>:


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title: os.popen & os.system lack shell-related security warnings -> [doc] os.popen & os.system lack shell-related security warnings
versions: +Python 3.10, Python 3.11, Python 3.9 -Python 2.7, Python 3.5

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<https://bugs.python.org/issue21557>
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