Issue #11014: Make 'filter' argument in tarfile.Tarfile.add() into a
keyword-only argument.  The preceding positional argument was deprecated,
so it made no sense to add filter as a positional argument.

(Patch reviewed by Brian Curtin and Anthony Long.)
diff --git a/Misc/NEWS b/Misc/NEWS
index 5655205..f2e37b5 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -16,6 +16,10 @@
 Library
 -------
 
+- Issue #11014: Make 'filter' argument in tarfile.Tarfile.add() into a
+  keyword-only argument.  The preceding positional argument was deprecated,
+  so it made no sense to add filter as a positional argument.
+
 - Issue #11004: Repaired edge case in deque.count().
 
 - Issue #10974: IDLE no longer crashes if its recent files list includes files