misc: Style change to keep lint happy

Signed-off-by: Arkady Gilinsky <[email protected]>

Author: ark-g

coverage/cmdline.py

@@ -819,7 +819,8 @@ def do_help(
 
         return False
 
-    def do_dump(self, signum: int, frame: types.FrameType | None) -> None:
+    def do_dump(self, _signum: int, _frame: types.FrameType | None) -> None:
+        """ Signal handler to dump coverage report """
         print("Dumping coverage data ...")
         self.coverage.save()