old_contents: 
  import unittest
  
  from sentinel_s3 import daily_metadata
  
  
  class Test(unittest.TestCase):
  
      def test_camelcase_underscore(self):
          daily_metadata(2015, 9, 1, '.')
  
new_contents: import unittest
  from sentinel_s3 import daily_metadata
  
  
  class Test(unittest.TestCase):
  
      def test_camelcase_underscore(self):
          daily_metadata(2015, 9, 1, '.')
  
subject: remove extra spaces