old_contents: #!/usr/bin/env python
  
  import unittest
  import load
  import os
  import mix
  
  class parseBPlinesTestCase(unittest.TestCase):
      def test_overwrite(self):
  	# Test that a later line overwrites a previous line
  	grid = mix.parseBPlines(['@foo@;bar;baz', '@foo@;rag'])
  	self.assertEqual(grid.tokens[0], '@foo@')
  	self.assertEqual(grid.list_values[0][0], 'rag')
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: #!/usr/bin/env python
  
  import unittest
  import load
  import os
  import mix
  
  
  class parseBPlinesTestCase(unittest.TestCase):
      def test_overwrite(self):
          # Test that a later line overwrites a previous line
          grid = mix.parseBPlines(['@foo@;bar;baz', '@foo@;rag'])
          self.assertEqual(grid.tokens[0], '@foo@')
          self.assertEqual(grid.list_values[0][0], 'rag')
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Make pep8 happy, remove mixed tabs and spaces