PD: adjust unit test for mirrored offset that doesn't fail any more
PD: adjust unit test for mirrored offset that doesn't fail any more

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master