docs: def mozjpeg(ext_args):
      """Create argument list for mozjpeg."""
      args = copy.copy(_MOZJPEG_ARGS)
      if Settings.destroy_metadata:
          args += ["-copy", "none"]
      else:
          args += ["-copy", "all"]
      args += ['-outfile']
      args += [ext_args.new_filename, ext_args.old_filename]
      extern.run_ext(args)
      return _JPEG_FORMAT