[issue45169] Shallow copy occurs when list multiplication is used to create nested lists; can confuse users

[2106 Hyunwoo Oh]

Change by 2106 Hyunwoo Oh <ohwphil at gmail.com>:


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components: +Interpreter Core -Demos and Tools

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45169>
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