flake8 fix

tests/test_browser.py

@@ -4885,7 +4885,7 @@ def test_manual_pthread_proxy_hammer(self, args):
                # don't run this with the default extra_tries value, as this is
                # *meant* to notice something random, a race condition.
                extra_tries=0)
-  
+
   # Tests audio worklets
   @requires_threads
   @requires_sound_hardware