old_contents: import unittest
  
  from datetime import date as vanilla_date
  
  from calexicon.internal.julian import distant_julian_to_gregorian, julian_to_gregorian, is_julian_leap_year
  
  
  class TestJulian(unittest.TestCase):
      def test_is_gregorian_leap_year(self):
          self.assertTrue(is_julian_leap_year(2000))
          self.assertTrue(is_julian_leap_year(1984))
          self.assertTrue(is_julian_leap_year(1900))
          self.assertFalse(is_julian_leap_year(1901))
  
      def test_distant_julian_to_gregorian(self):
          self.assertEqual(distant_julian_to_gregorian(9999, 12, 1), (10000, 2, 12))
  
      def test_julian_to_gregorian(self):
          self.assertEqual(julian_to_gregorian(1984, 2, 29), vanilla_date(1984, 3, 13))
  
new_contents: import unittest
  
  from datetime import date as vanilla_date
  
  from calexicon.internal.julian import distant_julian_to_gregorian, julian_to_gregorian
  from calexicon.internal.julian import is_julian_leap_year
  
  
  class TestJulian(unittest.TestCase):
      def test_is_gregorian_leap_year(self):
          self.assertTrue(is_julian_leap_year(2000))
          self.assertTrue(is_julian_leap_year(1984))
          self.assertTrue(is_julian_leap_year(1900))
          self.assertFalse(is_julian_leap_year(1901))
  
      def test_distant_julian_to_gregorian(self):
          self.assertEqual(distant_julian_to_gregorian(9999, 12, 1), (10000, 2, 12))
  
      def test_julian_to_gregorian(self):
          self.assertEqual(julian_to_gregorian(1984, 2, 29), vanilla_date(1984, 3, 13))
  
subject: Split long import line up into two.