code: def test_no_trailing_tab_on_empty_filedate(self):
      args = ["one", "two", "Original", "Current"]
      ud = difflib.unified_diff(*args, lineterm="")
      self.assertEqual(list(ud)[0:2], ["--- Original", "+++ Current"])
  
      cd = difflib.context_diff(*args, lineterm="")
      self.assertEqual(list(cd)[0:2], ["*** Original", "--- Current"])
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 2 for calling the TestOutputFormat obj's underlying member method code with example usage: obj.test_no_trailing_tab_on_empty_filedate() without return types