STY: Fix style complaints

Fix style complaints.

Author: jhlegarreta

src/nifreeze/model/gpr.py

@@ -490,12 +490,14 @@ def __init__(
         bval_index: int = 3,
     ) -> None:
         # Store init params for sklearn cloning
-        self.orientation_kernel = orientation_kernel if orientation_kernel is not None else SphericalKriging()
+        self.orientation_kernel = (
+            orientation_kernel if orientation_kernel is not None else SphericalKriging()
+        )
         self.radial_kernel = radial_kernel if radial_kernel is not None else RBF(length_scale=1.0)
         self.orientation_dims = tuple(orientation_dims)
         self.bval_index = bval_index
 
-        super().__init__(self.orientation_kernel, self.radial_kernel,)
+        super().__init__(self.orientation_kernel, self.radial_kernel)
 
     def get_params(self, deep: bool = True):  # noqa: D401
         # Return only __init__ parameters (sklearn clone() relies on this)

test/test_model_gpr.py

@@ -564,8 +564,8 @@ def test_multishellkernel_column_selection(orientation_dims, bval_index, nuisanc
     Y = X.copy()
     Y[:, bval_index] *= 1.5
 
-    Kxy0 = k(X, X)   # includes radial similarity at identical bvals
-    Kxy1 = k(X, Y)   # radial similarity with different bvals
+    Kxy0 = k(X, X)  # includes radial similarity at identical bvals
+    Kxy1 = k(X, Y)  # radial similarity with different bvals
 
     assert not np.allclose(Kxy0, Kxy1)