ruff on tests

Author: remrama

tests/test_evaluation.py

@@ -391,10 +391,12 @@ class TestSleepStatsAgreementPlotBlandAltman(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         import matplotlib
+
         matplotlib.use("Agg")
 
     def test_returns_facetgrid(self):
         import seaborn as sns
+
         g = ssa.plot_blandaltman(ci_method="param")
         assert isinstance(g, sns.FacetGrid)
 
@@ -477,7 +479,9 @@ def test_facetgrid_kwargs_passthrough(self):
         # FacetGrid col_wrap should reflect the override
         assert g._col_wrap == 1
 
+
 def ax_collections(ax):
     """Return PathCollections (scatter plots) from an Axes."""
     from matplotlib.collections import PathCollection
+
     return [c for c in ax.collections if isinstance(c, PathCollection)]