Repair logging test spew caused by rev. 51206.

Lib/logging/config.py

@@ -79,7 +79,7 @@ def fileConfig(fname, defaults=None):
     logging._acquireLock()
     try:
         logging._handlers.clear()
-        logging._handlerList = []
+        del logging._handlerList[:]
         # Handlers add themselves to logging._handlers
         handlers = _install_handlers(cp, formatters)
         _install_loggers(cp, handlers)

Lib/test/test_logging.py

@@ -493,7 +493,7 @@ def test4():
             try:
                 logging._handlers.clear()
                 logging._handlers.update(saved_handlers)
-                logging._handlerList = saved_handler_list
+                logging._handlerList[:] = saved_handler_list
                 loggerDict = logging.getLogger().manager.loggerDict
                 loggerDict.clear()
                 loggerDict.update(saved_loggers)
@@ -560,7 +560,7 @@ def test5():
         try:
             logging._handlers.clear()
             logging._handlers.update(saved_handlers)
-            logging._handlerList = saved_handler_list
+            logging._handlerList[:] = saved_handler_list
             loggerDict = logging.getLogger().manager.loggerDict
             loggerDict.clear()
             loggerDict.update(saved_loggers)