[issue29405] improve csv.Sniffer().sniff() behavior

[Xiang Zhang]

Xiang Zhang added the comment:

Sounds reasonable. IIUC if the sample data gets 11 lines the total could be 20. I also think the second min is redundant. Would you mind review my patch Milt?

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keywords: +patch
stage:  -> patch review
type: behavior -> enhancement
versions: +Python 3.7 -Python 3.5
Added file: http://bugs.python.org/file46509/csv_sniffer.patch

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<http://bugs.python.org/issue29405>
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