BUG: Stylistic update. (pandas-dev#39701)

Author: alexprincel

pandas/tests/util/test_show_versions.py

@@ -33,7 +33,7 @@ def as_json(request):
     "ignore:Distutils:UserWarning"
 )
 @pytest.mark.filterwarnings("ignore:Setuptools is replacing distutils:UserWarning")
-@pytest.mark.parametrize('as_json', [True, False, 'test_output.json'], indirect=True)
+@pytest.mark.parametrize("as_json", [True, False, "test_output.json"], indirect=True)
 def test_show_versions(capsys, as_json, tmpdir):
     # gh-32041
     if isinstance(as_json, str):
@@ -65,9 +65,9 @@ def test_show_versions(capsys, as_json, tmpdir):
         # make sure that the file was created
         assert os.path.exists(as_json)
 
-        with open(as_json, 'r') as fd:
+        with open(as_json, "r") as fd:
             contents = fd.readlines()
-            str_contents = ''.join(contents)
+            str_contents = "".join(contents)
 
             # make sure that there was output to the file
             assert str_contents