old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import os
  import unittest
  
  import pep8
  
  
  class UtilTestCase(unittest.TestCase):
      def test_normalize_paths(self):
          cwd = os.getcwd()
  
          self.assertEquals(pep8.normalize_paths(''), [])
          self.assertEquals(pep8.normalize_paths(['foo']), ['foo'])
          self.assertEquals(pep8.normalize_paths('foo'), ['foo'])
          self.assertEquals(pep8.normalize_paths('foo,bar'), ['foo', 'bar'])
          self.assertEquals(pep8.normalize_paths('/foo/bar,baz/../bat'),
                            ['/foo/bar', cwd + '/bat'])
          self.assertEquals(pep8.normalize_paths(".pyc,\n   build/*"),
                            ['.pyc', cwd + '/build/*'])
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import os
  import unittest
  
  import pep8
  
  
  class UtilTestCase(unittest.TestCase):
      def test_normalize_paths(self):
          cwd = os.getcwd()
  
          self.assertEquals(pep8.normalize_paths(''), [])
          self.assertEquals(pep8.normalize_paths([]), [])
          self.assertEquals(pep8.normalize_paths(None), [])
          self.assertEquals(pep8.normalize_paths(['foo']), ['foo'])
          self.assertEquals(pep8.normalize_paths('foo'), ['foo'])
          self.assertEquals(pep8.normalize_paths('foo,bar'), ['foo', 'bar'])
          self.assertEquals(pep8.normalize_paths('foo,  bar  '), ['foo', 'bar'])
          self.assertEquals(pep8.normalize_paths('/foo/bar,baz/../bat'),
                            ['/foo/bar', cwd + '/bat'])
          self.assertEquals(pep8.normalize_paths(".pyc,\n   build/*"),
                            ['.pyc', cwd + '/build/*'])
  
subject: Add a few more cases of "not value"