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

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

daphne/server.py

@@ -21,7 +21,7 @@ if current_reactor is not None:
             + "you can fix this warning by importing daphne.server early in your codebase or "
             + "finding the package that imports Twisted and importing it later on.",
             UserWarning,
-            stacklevel=2
+            stacklevel=2,
         )
         del sys.modules["twisted.internet.reactor"]
         asyncioreactor.install(twisted_loop)