Run isort on test folder

Author: WardBrian

test/test_compiler_opts.py

@@ -3,6 +3,7 @@
 import logging
 import os
 from test import check_present
+
 import pytest
 
 from cmdstanpy.compiler_opts import CompilerOptions

test/test_cxx_installation.py

@@ -1,6 +1,7 @@
 """install_cxx_toolchain tests"""
 
-from test import mark_windows_only, mark_not_windows
+from test import mark_not_windows, mark_windows_only
+
 import pytest
 
 from cmdstanpy import install_cxx_toolchain

test/test_install_cmdstan.py

@@ -1,6 +1,8 @@
 """install_cmdstan test"""
 from unittest import mock
+
 import pytest
+
 from cmdstanpy.install_cmdstan import (
     CmdStanInstallError,
     CmdStanRetrieveError,

test/test_model.py

@@ -1,14 +1,14 @@
 """CmdStanModel tests"""
 
 import contextlib
-from glob import glob
 import io
 import logging
 import os
 import re
 import shutil
 import tempfile
-from test import raises_nested, check_present
+from glob import glob
+from test import check_present, raises_nested
 from typing import List
 from unittest.mock import MagicMock, patch
 

test/test_utils.py

@@ -14,7 +14,7 @@
 import stat
 import string
 import tempfile
-from test import raises_nested, mark_windows_only, check_present
+from test import check_present, mark_windows_only, raises_nested
 from unittest import mock
 
 import numpy as np