code: def test_added_tab_hint(self):
      # Check fix for bug #1488943
      diff = list(
          difflib.Differ().compare(
              ["\tI am a buggy"], ["\t\tI am a bug"]
          )
      )
      self.assertEqual("- \tI am a buggy", diff[0])
      self.assertEqual("? \t          --\n", diff[1])
      self.assertEqual("+ \t\tI am a bug", diff[2])
      self.assertEqual("? +\n", diff[3])
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 4 for calling the TestSFbugs obj's underlying member method code with example usage: obj.test_added_tab_hint() without return types