fix the import and newline for comment

Author: LindaSummer

Lib/test/test_free_threading/test_threading.py

@@ -1,4 +1,6 @@
 import unittest
+import threading
+import _thread
 from test.support import threading_helper
 
 threading_helper.requires_working_threading(module=True)
@@ -7,7 +9,6 @@
 class TestRlock(unittest.TestCase):
     def test_repr_race(self):
         # gh-153292
-        import _thread
         r = _thread.RLock()
 
         def repr_thread():
@@ -24,9 +25,6 @@ def mutate_thread():
 
 class TestShutdown(unittest.TestCase):
     def test_shutdown_race(self):
-        import _thread
-        import threading
-
         ITERATIONS = 1_000
         STARTUP_THREADS = 4
 
@@ -61,5 +59,6 @@ def startup_worker():
             if cm.exc_value is not None:
                 raise cm.exc_value
 
+
 if __name__ == "__main__":
     unittest.main()