<human>:  3 extending an empty diff results in none type.
<bot>: Here is a Python function to 3 extending an empty diff results in none type

import difflib

def extend_diff_results_in_none(diff):
  """3 extending an empty diff results in none type."""
  return None

# Enter the diff
diff = difflib.Differ()
diff.compare("hello", "hello")

# Calling the function
print((extend_diff_results_in_none(diff)))

#Example Output

# None

#Remember to inspect code for bugs.