[issue22818] Deprecate splitting on possible zero-width re patterns

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Thank you Ezio for your review. Updated patch includes most of your suggestions. But I think some places still can be dim.

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Added file: http://bugs.python.org/file37863/re_deprecate_split_zero_width_3.patch

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<http://bugs.python.org/issue22818>
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