Close handler opened in test.

Lib/test/test_logging.py

@@ -3484,6 +3484,7 @@ class TimedRotatingFileHandlerTest(BaseFileTest):
     def test_rollover(self):
         fh = logging.handlers.TimedRotatingFileHandler(self.fn, 'S',
                                                        backupCount=1)
+        try:
             r = logging.makeLogRecord({'msg': 'testing'})
             fh.emit(r)
             self.assertLogFile(self.fn)
@@ -3506,7 +3507,8 @@ class TimedRotatingFileHandlerTest(BaseFileTest):
             for fn in (fn1, fn2):
                 if os.path.exists(fn):
                     self.rmfiles.append(fn)
-
+        finally:
+            fh.close()
 
     def test_invalid(self):
         assertRaises = self.assertRaises