Revert r53672, just fix signature of time_isoformat instead.
diff --git a/Misc/NEWS b/Misc/NEWS
index cd72a0c..92c7e7c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -111,7 +111,7 @@
 
 - Patch #1657276: Make NETLINK_DNRTMSG conditional.
 
-- Bug #1653736: Complain about keyword arguments to time.isoformat.
+- Bug #1653736: Fix signature of time_isoformat.
 
 - operator.count() now raises an OverflowError when the count reaches sys.maxint.