Patch #1623563: allow __class__ assignment for classes with __slots__.
The old and the new class are still required to have the same slot
names, but the order in which they are specified is not relevant.
diff --git a/Misc/ACKS b/Misc/ACKS
index 7b6002c..eeb266a 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -276,6 +276,7 @@
 Ivan Herman
 Jürgen Hermann
 Gary Herron
+Thomas Herve
 Bernhard Herzog
 Magnus L. Hetland
 Raymond Hettinger