[issue28128] Improve the warning message for invalid escape sequences

[Eric V. Smith]

Eric V. Smith added the comment:

Oops, use 28128-3.diff.

----------
Added file: http://bugs.python.org/file45285/28128-3.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28128>
_______________________________________