[issue42578] Add tip when encountering UnicodeDecode/Encode Error in open()

[wyz23x2]

wyz23x2 <wyz23x2 at 163.com> added the comment:

>>> (1,)(2, 3)
<stdin>:1: SyntaxWarning: 'tuple' object is not callable; perhaps you missed a comma?

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42578>
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