Aim for consistent repr of timestamp between C and Python impl.

persistent/tests/test_timestamp.py

@@ -148,10 +148,9 @@ class pyTimeStampTests(unittest.TestCase):
 
     def test_repr(self):
         from persistent.timestamp import _makeOctets
-        from persistent._compat import _native
         SERIAL = _makeOctets('\x01' * 8)
         ts = self._makeOne(SERIAL)
-        self.assertEqual(repr(ts), _native(SERIAL))
+        self.assertEqual(repr(ts), repr(SERIAL))
 
 class TimeStampTests(pyTimeStampTests):
 

persistent/timestamp.py

@@ -90,7 +90,7 @@ class pyTimeStamp(object):
         return self._raw
 
     def __repr__(self):
-        return _native(self._raw)
+        return repr(self._raw)
 
     def year(self):
         return self._elements[0]