chore: auto fixes from pre-commit.com hooks

Author: pre-commit-ci[bot]

main_test.py

@@ -133,7 +133,9 @@ def test_first_failure_keeps_banner_and_later_failures_use_no_banner(self):
             MagicMock(returncode=1, stdout="Type subject_imperative check failed\n"),
         ]
         with patch("main.subprocess.run", side_effect=results) as mock_run:
-            main.run_pr_message_checks(["ok first", "bad second", "bad third"], io.StringIO())
+            main.run_pr_message_checks(
+                ["ok first", "bad second", "bad third"], io.StringIO()
+            )
 
         self.assertEqual(
             mock_run.call_args_list[0][0][0], ["commit-check", "--message"]
@@ -162,15 +164,20 @@ def test_later_failure_prefix_uses_short_separator_without_extra_blank_lines(sel
         ]
         result_file = io.StringIO()
         with patch("main.subprocess.run", side_effect=results):
-            main.run_pr_message_checks(["ok first", "bad second", "bad third"], result_file)
+            main.run_pr_message_checks(
+                ["ok first", "bad second", "bad third"], result_file
+            )
 
         output = result_file.getvalue()
         self.assertIn("--- Commit 2/3: bad second\nCommit rejected.\n", output)
         self.assertIn(
             f"{main.COMMIT_SECTION_SEPARATOR}--- Commit 3/3: bad third\n",
             output,
         )
-        self.assertNotIn("------------------------------------------------------------------------", output)
+        self.assertNotIn(
+            "------------------------------------------------------------------------",
+            output,
+        )
         self.assertNotIn("\n\n\n", output)