Fix a broken test_dbm_gnu as introducted by r67380.

Lib/test/test_dbm_gnu.py

@@ -22,7 +22,7 @@ class TestGdbm(unittest.TestCase):
         self.g['12345678910'] = '019237410982340912840198242'
         self.g[b'bytes'] = b'data'
         key_set = set(self.g.keys())
-        self.assertEqual(key_set, set([b'a', b'12345678910']))
+        self.assertEqual(key_set, set([b'a', b'bytes', b'12345678910']))
         self.assert_(b'a' in self.g)
         self.assertEqual(self.g[b'bytes'], b'data')
         key = self.g.firstkey()