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

[Ned Deily]

Ned Deily added the comment:

Note that 1b162d6e3d01 in Issue27030 (for 3.6.0rc1) has changed the behavior for re.sub replacement templates to produce a deprecation warning in 3.6 while still being treated as an error in 3.7.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28450>
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