Bug #1653736: Properly discard third argument to slot_nb_inplace_power.
Will backport.
diff --git a/Misc/NEWS b/Misc/NEWS
index 25b72c2..faf7d2d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@
 Core and builtins
 -----------------
 
+- Bug #1653736: Properly discard third argument to slot_nb_inplace_power.
+
 - PEP 352: Raising a string exception now triggers a TypeError.  Attempting to
   catch a string exception raises DeprecationWarning.