fix: satisfy flake8 — drop unused import, shorten long lines

Author: Ikalus1988

pre_commit_hooks/check_dco.py

@@ -12,7 +12,6 @@
 import argparse
 import re
 from collections.abc import Sequence
-from typing import Optional
 
 DCO_PATTERN = re.compile(
     r'^Signed-off-by:\s+'
@@ -54,7 +53,7 @@ def check_dco(commit_msg_path: str) -> tuple[int, list[str]]:
         # No sign-off found at all
         errors.append(
             f'{commit_msg_path}: missing Signed-off-by line. '
-            f'Add "Signed-off-by: Your Name <your@email>" to the commit message.',
+            f'Add "Signed-off-by: Name <email>" to the commit message.',
         )
 
     for err in errors:

tests/check_dco_test.py

@@ -118,7 +118,8 @@ def test_multiline_commit_with_signoff():
 
 def test_missing_signoff():
     """A commit message without any Signed-off-by line should fail."""
-    msg = _write_commit_msg('fix: resolve timeout issue\n\nJust a quick fix.\n')
+    body = 'fix: resolve timeout issue\n\nJust a quick fix.\n'
+    msg = _write_commit_msg(body)
     try:
         code, errors = check_dco(msg)
         assert code == 1