[issue30187] Regex becomes invalid in python 3.6

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

This is ambiguous syntax. Unknown escapes consisting of '\' and ASCII letter were deprecated in 3.5 (run the interpreter with the option -Wa to see all warnings) and are errors since 3.6. Note that the string literal '[^\B]' itself produces a DeprecationWarning in 3.6.

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nosy: +serhiy.storchaka
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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<http://bugs.python.org/issue30187>
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