def _prepare_data_for_reporting(self) -> None:
        """Re-map data before reporting, to get implicit "combine" behavior."""
        if self.config.paths:
            mapped_data = CoverageData(warn=self._warn, debug=self._debug, no_disk=True)
            if self._data is not None:
                mapped_data.update(self._data, map_path=self._make_aliases().map)
            self._data = mapped_data
Re-map data before reporting, to get implicit "combine" behavior.
coverage/control.py