[issue22493] Deprecate the use of flags not at the start of regular expression

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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assignee:  -> serhiy.storchaka
versions: +Python 3.6 -Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22493>
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