unittest_brain.HashlibTC.test_hashlib() fails with Python 3.2

[pylint-bot]

Originally reported by: Arfrever Frehtes Taifersar Arahesis (BitBucket: arfrever, GitHub: @Arfrever?)

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unittest_brain.HashlibTC.test_hashlib() fails with Python 3.2.

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ERROR: test_hashlib (unittest_brain.HashlibTC)
Tests that brain extensions for hashlib work.
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...
  File "<string>", line 6
    return u''
             ^
SyntaxError: invalid syntax

I attach patch.

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/29

[pylint-bot]

Original comment by Viktor Hercinger (BitBucket: herczy, GitHub: @herczy?):

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This doesn't just fail with the unittest, but also with a simple import hashlib too.

[pylint-bot]

Original comment by Torsten Marek (BitBucket: tmarek, GitHub: @tmarek?):

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Fixed.

[pylint-bot]

Original comment by Torsten Marek (BitBucket: tmarek, GitHub: @tmarek?):

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Return proper string types for hashlib overlay. Fixes #29.