code: def test_mdiff_catch_stop_iteration(self):
      # Issue #33224
      self.assertEqual(
          list(difflib._mdiff(["2"], ["3"], 1)),
          [((1, "\x00-2\x01"), (1, "\x00+3\x01"), True)],
      )
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 6 for calling the TestSFbugs obj's underlying member method code with example usage: obj.test_mdiff_catch_stop_iteration() without return types