Issue #13575: there is only one class type.
diff --git a/Lib/pickle.py b/Lib/pickle.py
index a911ca0..ca36274 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -375,7 +375,7 @@
# allowing protocol 0 and 1 to work normally. For this to
# work, the function returned by __reduce__ should be
# called __newobj__, and its first argument should be a
- # new-style class. The implementation for __newobj__
+ # class. The implementation for __newobj__
# should be as follows, although pickle has no way to
# verify this:
#
diff --git a/Lib/pickletools.py b/Lib/pickletools.py
index 515d375..9086416 100644
--- a/Lib/pickletools.py
+++ b/Lib/pickletools.py
@@ -1639,6 +1639,8 @@
is pushed on the stack.
NOTE: checks for __safe_for_unpickling__ went away in Python 2.3.
+ NOTE: the distinction between old-style and new-style classes does
+ not make sense in Python 3.
"""),
I(name='OBJ',