[issue23041] csv needs more quoting rules

[Yoong Hor Meng]

Yoong Hor Meng <yoonghm at gmail.com> added the comment:

There is a real requirement for csv to handle an empty field vs a empty string """".  csv.QUOTE_NOTNULL could be useful.

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nosy: +yoonghm
versions: +Python 3.8 -Python 3.6

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<https://bugs.python.org/issue23041>
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