code: def clean_doctest_list(doctest_file: str, overwrite: bool = False):
      """
      Cleans the doctest in a given file.
  
      Args:
          doctest_file (`str`):
              The path to the doctest file to check or clean.
          overwrite (`bool`, *optional*, defaults to `False`):
              Whether or not to fix problems. If `False`, will error when the file is not clean.
      """
      non_existent_paths = []
      all_paths = []
      with open(doctest_file, "r", encoding="utf-8") as f:
          for line in f:
              line = line.strip().split(" ")[0]
              path = os.path.join(REPO_PATH, line)
              if not (os.path.isfile(path) or os.path.isdir(path)):
                  non_existent_paths.append(line)
              all_paths.append(line)
  
      if len(non_existent_paths) > 0:
          non_existent_paths = "\n".join(
              [f"- {f}" for f in non_existent_paths]
          )
          raise ValueError(
              f"`{doctest_file}` contains non-existent paths:\n{non_existent_paths}"
          )
  
      sorted_paths = sorted(all_paths)
      if all_paths != sorted_paths:
          if not overwrite:
              raise ValueError(
                  f"Files in `{doctest_file}` are not in alphabetical order, run `make fix-copies` to fix "
                  "this automatically."
              )
          with open(doctest_file, "w", encoding="utf-8") as f:
              f.write("\n".join(sorted_paths) + "\n")
  
label_desc: Use image node_id 1 for calling a global function with example usage: clean_doctest_list(doctest_file, overwrite) without return types