[py] fix linting issue

Author: titusfortner

py/conftest.py

@@ -99,7 +99,7 @@ def driver(request):
     kwargs = {}
 
     # browser can be changed with `--driver=firefox` as an argument or to addopts in pytest.ini
-    driver_class = getattr(request, 'param', 'Chrome').capitalize()
+    driver_class = getattr(request, "param", "Chrome").capitalize()
 
     # skip tests if not available on the platform
     _platform = platform.system()