nixos-test-driver: reformat with latest ruff

nixos/lib/test-driver/src/test_driver/__init__.py

@@ -145,7 +145,7 @@ def main() -> None:
             tic = time.time()
             driver.run_tests()
             toc = time.time()
-            logger.info(f"test script finished in {(toc-tic):.2f}s")
+            logger.info(f"test script finished in {(toc - tic):.2f}s")
 
 
 def generate_driver_symbols() -> None:

nixos/lib/test-driver/src/test_driver/machine.py

@@ -702,8 +702,7 @@ class Machine:
 
     def get_tty_text(self, tty: str) -> str:
         status, output = self.execute(
-            f"fold -w$(stty -F /dev/tty{tty} size | "
-            f"awk '{{print $2}}') /dev/vcs{tty}"
+            f"fold -w$(stty -F /dev/tty{tty} size | awk '{{print $2}}') /dev/vcs{tty}"
         )
         return output