docs: def autopep8_diff(fpath):
      r"""
      Args:
          fpath (str):  file path string
  
      CommandLine:
          python -m utool.util_dev --test-autopep8_diff --fpath ingest_data.py
  
      Example:
          >>> # DISABLE_DOCTEST
          >>> from utool.util_dev import *  # NOQA
          >>> fpath = ut.get_argval('--fpath', type_=str, default='ingest_data.py')
          >>> result = autopep8_diff(fpath)
          >>> print(result)
      """
      import utool as ut
      args = ('autopep8', fpath, '--diff')
      res = ut.cmd(args, verbose=False)
      out, err, ret = res
      ut.print_difftext(out)