[docs] [issue28450] Misleading/inaccurate documentation about unknown escape sequences in regular expressions

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

The deprecation was documented in 3.5.

https://docs.python.org/3.5/library/re.html#re.sub

Deprecated since version 3.5, will be removed in version 3.6: Unknown escapes consist of '\' and ASCII letter now raise a deprecation warning and will be forbidden in Python 3.6.

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