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

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Author: pre-commit-ci[bot]

xarray/tests/test_merge.py

@@ -243,9 +243,10 @@ def test_merge_attrs_drop_conflicts_non_bool_eq(self):
         or falsy equality results as non-equivalent, dropping the attribute rather
         than raising an error.
         """
-        import numpy as np
         import warnings
 
+        import numpy as np
+
         # Test with numpy arrays (which return arrays from ==)
         arr1 = np.array([1, 2, 3])
         arr2 = np.array([1, 2, 3])