fix(test.pickle): ad hoc fix for change in object.__reduce__ signature

fix #461

Author: e-kwsm

test/pickle1.py

@@ -9,7 +9,10 @@
     1
     >>> pickle1_ext.world.__name__
     'world'
-    >>> pickle1_ext.world('Hello').__reduce__()
+    >>> # XXX: until python 3.10: 2-element tuple
+    >>> # XXX: since python 3.11: 3-element tuple (object's state added)
+    >>> # https://docs.python.org/3.11/library/pickle.html#object.__reduce__
+    >>> pickle1_ext.world('Hello').__reduce__()[:2]
     (<class 'pickle1_ext.world'>, ('Hello',))
     >>> wd = pickle1_ext.world('California')
     >>> pstr = pickle.dumps(wd)

test/pickle4.py

@@ -12,7 +12,10 @@
     1
     >>> pickle4_ext.world.__name__
     'world'
-    >>> pickle4_ext.world('Hello').__reduce__()
+    >>> # XXX: until python 3.10: 2-element tuple
+    >>> # XXX: since python 3.11: 3-element tuple (object's state added)
+    >>> # https://docs.python.org/3.11/library/pickle.html#object.__reduce__
+    >>> pickle4_ext.world('Hello').__reduce__()[:2]
     (<class 'pickle4_ext.world'>, ('Hello',))
     >>> wd = pickle4_ext.world('California')
     >>> pstr = pickle.dumps(wd)