(issue 7413 does not concern py3k, I merge the test nonetheless)

Merged revisions 77122 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r77122 | amaury.forgeotdarc | 2009-12-29 23:03:38 +0100 (mar., 29 déc. 2009) | 3 lines

  #7413: Passing '\0' as the separator to datetime.datetime.isoformat()
  used to drop the time part of the result.
........

Lib/test/test_datetime.py

@@ -1178,6 +1178,7 @@ class TestDateTime(TestDate):
         self.assertEqual(t.isoformat(),    "0002-03-02T04:05:01.000123")
         self.assertEqual(t.isoformat('T'), "0002-03-02T04:05:01.000123")
         self.assertEqual(t.isoformat(' '), "0002-03-02 04:05:01.000123")
+        self.assertEqual(t.isoformat('\x00'), "0002-03-02\x0004:05:01.000123")
         # str is ISO format with the separator forced to a blank.
         self.assertEqual(str(t), "0002-03-02 04:05:01.000123")