misc: Style fix

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

Author: ark-g

coverage/cmdline.py

@@ -874,7 +874,7 @@ def do_run(self, options: optparse.Values, args: list[str]) -> int:
             elif options.dump_signal.upper() == 'USR2':
                 signal.signal(signal.SIGUSR2, self.do_dump)
             else:
-                show_help(f"Unsupported signal for dump coverage report was provided: {options.dump_signal}.")
+                show_help(f"Unsupported signal for dump coverage report: {options.dump_signal}")
                 return ERR
 
         # Run the script.