corrected a possible black.py generated artefact

nabu/preproc/tests/test_alignment.py

@@ -535,5 +535,5 @@ class TestFocus(object):
         exp_shape = np.array([2160, 2160])
         new_shape = alignment.CameraFocus._check_img_block_size(inp_shape, 4, suggest_new_shape=True)
 
-        message = "New suggested shape: %s and expected: %s do not coincide" % (new_shape, exp_shape,)
+        message = "New suggested shape: %s and expected: %s do not coincide" % (new_shape, exp_shape)
         assert np.all(new_shape == exp_shape), message