code: def test_remove_repeated_substrings(self):
      cleaner = DocumentCleaner(
          remove_empty_lines=False,
          remove_extra_whitespaces=False,
          remove_repeated_substrings=True,
      )
  
      text = """First PageThis is a header.
          Page  of
          2
          4
          Lorem ipsum dolor sit amet
          This is a footer number 1
          This is footer number 2This is a header.
          Page  of
          3
          4
          Sid ut perspiciatis unde
          This is a footer number 1
          This is footer number 2This is a header.
          Page  of
          4
          4
          Sed do eiusmod tempor.
          This is a footer number 1
          This is footer number 2"""
  
      expected_text = """First Page 2
          4
          Lorem ipsum dolor sit amet 3
          4
          Sid ut perspiciatis unde 4
          4
          Sed do eiusmod tempor."""
      result = cleaner.run(documents=[Document(content=text)])
      assert result["documents"][0].content == expected_text
  
file_path: haystack/test/components/preprocessors/test_document_cleaner.py
imports: import logging
  import pytest
  from haystack import Document
  from haystack.components.preprocessors import DocumentCleaner
label_desc: Use image node_id 9 for calling the TestDocumentCleaner obj's underlying member method code with example usage: obj.test_remove_repeated_substrings() without return types