adapt doctest syntax to make it work in Py3.2 (no 'u' string prefix)

tests/run/hasattr.pyx

@@ -9,6 +9,10 @@ class Foo:
     def baz(self):
         return int(1)/int(0)
 
+
+unicode_foo = u"foo"
+
+
 def wrap_hasattr(obj, name):
     """
     >>> wrap_hasattr(None, "abc")
@@ -17,7 +21,7 @@ def wrap_hasattr(obj, name):
     True
     >>> wrap_hasattr(Foo(), "foo")
     True
-    >>> wrap_hasattr(Foo(), u"foo")
+    >>> wrap_hasattr(Foo(), unicode_foo)
     True
     >>> wrap_hasattr(Foo(), "spam")
     False