Updated whats new to reference issue & attribute changes

Author: robintw

doc/whats-new.rst

@@ -26,9 +26,10 @@ Enhancements
 
 - Added ability to save ``DataArray`` objects directly to netCDF files using
   :py:meth:`~xarray.DataArray.to_netcdf`, and to load directly from netCDF files
-  using :py:func:`~xarray.open_dataarray`. These remove the need to convert a
-  ``DataArray`` to a ``Dataset`` before saving as a netCDF file, and deals with
-  names to ensure a perfect 'roundtrip' capability.
+  using :py:func:`~xarray.open_dataarray` (:issue:`915`). These remove the need
+  to convert a ``DataArray`` to a ``Dataset`` before saving as a netCDF file,
+  and deals with names to ensure a perfect 'roundtrip' capability.
+  By `Robin Wilson <https://github.com/robintw`_.
 
 Bug fixes
 ~~~~~~~~~