Check deprecated warning in test

Author: aisk

Lib/test/test_winreg.py

@@ -233,9 +233,15 @@ def test_registry_works_with_options(self):
                                                 options=REG_OPTION_VOLATILE)
         self._write_test_data(HKEY_CURRENT_USER, CreateKey=ckeo)
 
-        okeo = lambda key, sub_key: OpenKeyEx(key, sub_key, REG_OPTION_VOLATILE, KEY_READ)
+        okeo = lambda key, sub_key: OpenKeyEx(key, sub_key, REG_OPTION_VOLATILE,
+                                              KEY_READ)
         self._read_test_data(HKEY_CURRENT_USER, OpenKey=okeo)
 
+        with self.assertWarns(DeprecationWarning):
+            okeo = lambda key, sub_key: OpenKeyEx(key, sub_key,
+                                                  reserved=REG_OPTION_VOLATILE)
+            self._read_test_data(HKEY_CURRENT_USER, OpenKey=okeo)
+
         self._delete_test_data(HKEY_CURRENT_USER)
 
     def test_create_only(self):

PC/winreg.c

@@ -1412,9 +1412,7 @@ winreg.OpenKey -> HKEY
     sub_key: Py_UNICODE(accept={str, NoneType})
         A string that identifies the sub_key to open.
     reserved: int = 0
-        A reserved integer that be should zero.  If it is not zero,
-        it will be used as the options parameter for compatibility reasons.
-        Default is zero.
+        A reserved integer that must be zero. Default is zero.
     access: REGSAM(c_default='KEY_READ') = winreg.KEY_READ
         An integer that specifies an access mask that describes the desired
         security access for the key.  Default is KEY_READ.