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

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

Author: pre-commit-ci[bot]

src/_pytest/unittest.py

@@ -405,7 +405,7 @@ class TwistedVersion(Enum):
 
 
 def _get_twisted_version() -> TwistedVersion:
-    # We need to check if "twisted.trial.unittest" is specifically present in sys.modules. 
+    # We need to check if "twisted.trial.unittest" is specifically present in sys.modules.
     # This is because we intend to integrate with Trial only when it's actively running the test suite, but not needed when only other Twisted components are in use.
     if "twisted.trial.unittest" not in sys.modules:
         return TwistedVersion.NotInstalled