Removes whitespace for code consistency

Removes trailing whitespace to improve code consistency
and adhere to style guidelines.

Author: eclipse0922

python/test/t/registration/test_registration.py

@@ -208,7 +208,7 @@ def test_icp_symmetric(device):
     supported_dtypes = [o3c.float32, o3c.float64]
     for dtype in supported_dtypes:
         source_t, target_t = get_pcds(dtype, device)
-        
+
         # Symmetric ICP requires normals for both source and target
         source_t.estimate_normals()
         target_t.estimate_normals()