[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

ipyparallel/tests/test_util.py

@@ -15,6 +15,6 @@ def test_disambiguate_ip():
         RuntimeWarning, match=f"IPython could not determine IPs for {wontresolve}"
     ):
         assert util.disambiguate_ip_address('0.0.0.0', wontresolve) == wontresolve
-    if (public_ips()):
+    if public_ips():
         public_ip = public_ips()[0]
         assert util.disambiguate_ip_address('0.0.0.0', public_ip) == localhost()