[issue2570] backport 3.0-style \u/\U processing in raw strings when unicode_literals is imported from __future__

[R. David Murray]

Changes by R. David Murray <rdmurray at bitdance.com>:


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keywords: +patch
stage: test needed -> needs patch
Added file: http://bugs.python.org/file13450/issue2570-test.patch

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<http://bugs.python.org/issue2570>
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