Apply isort to tests.sandbox sub-package modules

tests/sandbox/linalg/test_linalg.py

-import pytest
-
 import numpy as np
 import numpy.linalg
+import pytest
 
 import theano
-
-from theano import config, tensor, function
-from theano.tensor.basic import _allclose
-from theano.tensor.nlinalg import MatrixInverse
-from theano.tensor import DimShuffle
+from tests import unittest_tools as utt
+from tests.test_rop import break_op
+from theano import config, function, tensor
 
 # The one in comment are not tested...
+from theano.sandbox.linalg.ops import Cholesky  # PSD_hint,; op class
 from theano.sandbox.linalg.ops import (
-    Cholesky,  # op class
-    matrix_inverse,
     Solve,
-    solve,
-    # PSD_hint,
-    spectral_radius_bound,
     imported_scipy,
     inv_as_solve,
+    matrix_inverse,
+    solve,
+    spectral_radius_bound,
 )
-
-from tests import unittest_tools as utt
-from tests.test_rop import break_op
+from theano.tensor import DimShuffle
+from theano.tensor.basic import _allclose
+from theano.tensor.nlinalg import MatrixInverse
 
 
 def test_rop_lop():

tests/sandbox/test_jax.py

-import pytest
-
 import numpy as np
+import pytest
 
 import theano
 import theano.tensor as tt
 
+
 jax = pytest.importorskip("jax")
 
 from functools import partial  # noqa: E402

tests/sandbox/test_minimal.py

-import pytest
 import numpy as np
-
-from theano import tensor, function
-from theano.sandbox.minimal import minimal
+import pytest
 
 from tests import unittest_tools as utt
+from theano import function, tensor
+from theano.sandbox.minimal import minimal
 
 
 @pytest.mark.skip(reason="Unfinished test")

tests/sandbox/test_multinomial.py

 import numpy as np
 
 import tests.unittest_tools as utt
-
 from theano import config, function, tensor
 from theano.sandbox import multinomial
 

tests/sandbox/test_rng_mrg.py

@@ -6,13 +6,11 @@ import numpy as np
 import pytest
 
 import theano
-
-
+from tests import unittest_tools as utt
 from theano import change_flags, config, tensor
 from theano.sandbox import rng_mrg
 from theano.sandbox.rng_mrg import MRG_RandomStreams
 
-from tests import unittest_tools as utt
 
 # TODO: test MRG_RandomStreams
 # Partly done in test_consistency_randomstreams