Fix isort + update whats-new

Author: dcherian

doc/whats-new.rst

@@ -87,7 +87,9 @@ Documentation
 - Users are instructed to try ``use_cftime=True`` if a ``TypeError`` occurs when combining datasets and one of the types involved is a subclass of ``cftime.datetime`` (:pull:`5776`).
   By `Zeb Nicholls <https://github.com/znicholls>`_.
 - Better examples in docstrings for groupby and resampling reductions.
-  By `Deepak Cherian <https://github.com/dcherian>`_.
+  By `Deepak Cherian <https://github.com/dcherian>`_,
+  `Maximilian Roos <https://github.com/max-sixty>`_,
+  `Jimmy Westling <https://github.com/illviljan>`_ .
 - A clearer error is now raised if a user attempts to assign a Dataset to a single key of
   another Dataset. (:pull:`5839`)
   By `Tom Nicholas <https://github.com/TomNicholas>`_.

xarray/core/_reductions.py

@@ -1,7 +1,7 @@
 """Mixin classes with reduction operations."""
 # This file was generated using xarray.util.generate_reductions. Do not edit manually.
 
-from typing import Optional, Callable, Union, Sequence, Hashable, Protocol, Any
+from typing import Any, Callable, Hashable, Optional, Protocol, Sequence, Union
 
 from . import duck_array_ops
 from .types import T_DataArray, T_Dataset

xarray/util/generate_reductions.py

@@ -22,7 +22,7 @@
 """Mixin classes with reduction operations."""
 # This file was generated using xarray.util.generate_reductions. Do not edit manually.
 
-from typing import Optional, Callable, Union, Sequence, Hashable, Protocol, Any
+from typing import Any, Callable, Hashable, Optional, Protocol, Sequence, Union
 
 from . import duck_array_ops
 from .types import T_DataArray, T_Dataset'''