Merge branch 'main' into groupby-aggs-using-numpy-groupies

* main:
  Generate reductions for DataArray, Dataset, GroupBy and Resample (pydata#5950)
  explicitly install `ipython_genutils` (pydata#6350)

ci/requirements/doc.yml

@@ -12,6 +12,7 @@ dependencies:
   - h5netcdf>=0.7.4
   - ipykernel
   - ipython
+  - ipython_genutils  # remove once `nbconvert` fixed its dependencies
   - iris>=2.3
   - jupyter_client
   - matplotlib-base

xarray/tests/test_duck_array_ops.py

@@ -1,6 +1,5 @@
 import datetime as dt
 import warnings
-from textwrap import dedent
 
 import numpy as np
 import pandas as pd

xarray/util/generate_reductions.py

@@ -53,7 +53,6 @@ def reduce(
     ) -> "{obj}":
         raise NotImplementedError()"""
 
-
 GROUPBY_PREAMBLE = """
 
 class {obj}{cls}Reductions:
@@ -78,7 +77,6 @@ def _flox_reduce(
     ) -> "{obj}":
         raise NotImplementedError()"""
 
-
 TEMPLATE_REDUCTION_SIGNATURE = '''
     def {method}(
         self,
@@ -395,7 +393,6 @@ class DataStructure:
     example_var_name="ds",
     numeric_only=True,
 )
-
 DATAARRAY_OBJECT = DataStructure(
     name="DataArray",
     docstring_create="""