diff --git a/python/adjoint/filters.py b/python/adjoint/filters.py
index 1c8b5d212..e0f3a2e81 100644
--- a/python/adjoint/filters.py
+++ b/python/adjoint/filters.py
@@ -256,7 +256,7 @@ def mesh_grid(
     X, Y = np.meshgrid(xv, yv, sparse=True, indexing="ij")
 
     return Nx, Ny, X, Y
-    
+
 
 def cylindrical_filter(
     x: np.ndarray,