old_contents: import sys
  import unittest
  
  sys.path.insert(0, ".")
  from coalib.tests.parsing.StringProcessing.StringProcessingTestBase import (
      StringProcessingTestBase)
  from coalib.parsing.StringProcessing import unescape
  
  
  class UnescapeTest(StringProcessingTestBase):
      # Test the unescape() function.
      def test_basic(self):
          expected_results = [
              r"out1 'escaped-escape:        \ ' out2",
              r"out1 'escaped-quote:         ' ' out2",
              r"out1 'escaped-anything:      X ' out2",
              r"out1 'two escaped escapes: \\ ' out2",
              r"out1 'escaped-quote at end:   '' out2",
              r"out1 'escaped-escape at end:  \' out2",
              r"out1           'str1' out2 'str2' out2",
              r"out1 '        'str1' out2 'str2' out2",
              r"out1 \'      'str1' out2 'str2' out2",
              r"out1 \        'str1' out2 'str2' out2",
              r"out1 \\      'str1' out2 'str2' out2",
              r"out1         \'str1' out2 'str2' out2",
              r"out1       \\'str1' out2 'str2' out2",
              r"out1           'str1''str2''str3' out2",
              r"",
              r"out1 out2 out3",
              r"",
              self.bs]
  
          self.assertResultsEqual(
              unescape,
              {(test_string,): result
               for test_string, result in zip(self.test_strings,
                                              expected_results)})
  
      # Test unescape() with custom test strings that could uncover special
      # flaws.
      def test_extended(self):
          self.assertEqual(unescape("hello\\"), "hello")
          self.assertEqual(unescape("te\st\\\\"), "test\\")
          self.assertEqual(unescape("\\\\\\"), "\\")
  
  
  if __name__ == '__main__':
      unittest.main(verbosity=2)
  
  
new_contents: import sys
  import unittest
  
  sys.path.insert(0, ".")
  from coalib.tests.parsing.StringProcessing.StringProcessingTestBase import (
      StringProcessingTestBase)
  from coalib.parsing.StringProcessing import unescape
  
  
  class UnescapeTest(StringProcessingTestBase):
      # Test the unescape() function.
      def test_basic(self):
          expected_results = [
              r"out1 'escaped-escape:        \ ' out2",
              r"out1 'escaped-quote:         ' ' out2",
              r"out1 'escaped-anything:      X ' out2",
              r"out1 'two escaped escapes: \\ ' out2",
              r"out1 'escaped-quote at end:   '' out2",
              r"out1 'escaped-escape at end:  \' out2",
              r"out1           'str1' out2 'str2' out2",
              r"out1 '        'str1' out2 'str2' out2",
              r"out1 \'      'str1' out2 'str2' out2",
              r"out1 \        'str1' out2 'str2' out2",
              r"out1 \\      'str1' out2 'str2' out2",
              r"out1         \'str1' out2 'str2' out2",
              r"out1       \\'str1' out2 'str2' out2",
              r"out1           'str1''str2''str3' out2",
              r"",
              r"out1 out2 out3",
              r"",
              self.bs]
  
          self.assertResultsEqual(
              unescape,
              {(test_string,): result
               for test_string, result in zip(self.test_strings,
                                              expected_results)})
  
      # Test unescape() with custom test strings that could uncover special
      # flaws.
      def test_extended(self):
          self.assertEqual(unescape("hello\\"), "hello")
          self.assertEqual(unescape("te\\st\\\\"), "test\\")
          self.assertEqual(unescape("\\\\\\"), "\\")
  
  
  if __name__ == '__main__':
      unittest.main(verbosity=2)
  
  
subject: Correct test string