code: def test_clean(self):
      result = config_util._clean(" clean    this         text  ")
      self.assertEqual(" clean this text ", result)
  
imports: import copy
  import re
  import textwrap
  import unittest
  from unittest.mock import patch
  from parameterized import parameterized
  from streamlit import config, config_util
  from streamlit.config_option import ConfigOption
label_desc: Use image node_id 1 for calling the ConfigUtilTest obj's underlying member method code with example usage: obj.test_clean() without return types