xarray.merge warning compat #1601
Description
At the end of SetGroupsEK80.set_vendor(), xr.merge triggers the warning below:
In a future version of xarray the default value for compat will change from compat='no_conflicts' to compat='override'. This is likely to lead to different results when combining overlapping variables with the same name. To opt in to new defaults and get rid of these warnings now use `set_options(use_new_combine_kwarg_defaults=True) or set compat explicitly.
Would be good to pre-empt this change to ensure consistent results.