not directly testing _title_for_slice
not directly testing _title_for_slice

shoyer/xarray,jhamman/xarray,markelg/xray,jhamman/xarray,pydata/xarray,pydata/xarray,drewokane/xray,petercable/xray,shoyer/xarray,pydata/xarray,jhamman/xarray,cpaulik/xray,chunweiyuan/xarray,xray/xray,cpaulik/xray,NicWayand/xray,rabernat/xray,markelg/xray,rabernat/xray,jcmgray/xarray,shoyer/xray,jhamman/xray,markelg/xray