old_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  import unittest
  from textwrap import dedent
  
  from conllu import parse, parse_tree
  from conllu.compat import text
  
  
  class TestParse(unittest.TestCase):
      def test_multiple_sentences(self):
          data = dedent("""\
              1   The     the    DET    DT   Definite=Def|PronType=Art   4   det     _   _
              2   dog     dog    NOUN   NN   Number=Sing                 5   nmod    _   SpaceAfter=No
              3  .       .      PUNCT  .    _                           5   punct   _   _
  
              1   The     the    DET    DT   Definite=Def|PronType=Art   4   det     _   _
              2   dog     dog    NOUN   NN   Number=Sing                 5   nmod    _   SpaceAfter=No
              3  .       .      PUNCT  .    _                           5   punct   _   _
  
          """)
          self.assertEqual(
              text(parse(data)),
              "[TokenList<The, dog, .>, TokenList<The, dog, .>]"
          )
  
new_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  import unittest
  from textwrap import dedent
  
  from conllu import parse
  from conllu.compat import text
  
  
  class TestParse(unittest.TestCase):
      def test_multiple_sentences(self):
          data = dedent("""\
              1   The     the    DET    DT   Definite=Def|PronType=Art   4   det     _   _
              2   dog     dog    NOUN   NN   Number=Sing                 5   nmod    _   SpaceAfter=No
              3  .       .      PUNCT  .    _                           5   punct   _   _
  
              1   The     the    DET    DT   Definite=Def|PronType=Art   4   det     _   _
              2   dog     dog    NOUN   NN   Number=Sing                 5   nmod    _   SpaceAfter=No
              3  .       .      PUNCT  .    _                           5   punct   _   _
  
          """)
          self.assertEqual(
              text(parse(data)),
              "[TokenList<The, dog, .>, TokenList<The, dog, .>]"
          )
  
subject: Remove unused import.