unittest failure in test_source #1

python -m unittest pythonparser.test.test_source
............F....
======================================================================
FAIL: test_repr (pythonparser.test.test_source.RangeTestCase)
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Traceback (most recent call last):
  File
"/home/fallen/miniconda3/envs/_test/lib/python3.4/site-packages/pythonparser/test/test_source.py",
line 42, in test_repr
    repr(self.range(0, 2)))
AssertionError: 'Range("<input>", 0, 2)' != 'Range("<input>", 0, 2, None)'
- Range("<input>", 0, 2)
+ Range("<input>", 0, 2, None)
?                      ++++++


----------------------------------------------------------------------
Ran 17 tests in 0.003s

FAILED (failures=1)