[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

xarray/backends/netCDF4_.py

@@ -438,13 +438,19 @@ def get_encoding(self):
         }
 
     def get_group_stores(self):
-        return FrozenDict((group_name, self.select_group(group_name)) for group_name in self.ds.groups)
+        return FrozenDict(
+            (group_name, self.select_group(group_name)) for group_name in self.ds.groups
+        )
 
     def select_group(self, group):
         """Return new NetCDF4DataStore for specified group of this NetCDF4DataStore."""
         if group in self.ds.groups:
             return self.__init__(
-                manager=self._manager, group=group, mode=self._mode, lock=self.lock, autoclose=self.autoclose
+                manager=self._manager,
+                group=group,
+                mode=self._mode,
+                lock=self.lock,
+                autoclose=self.autoclose,
             )
         else:
             raise KeyError(group)