correct filter message for warnings
correct filter message for warnings

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