Move PEP 218 to the Completed features list.

pep-0283.txt

@@ -77,6 +77,14 @@ Completed features for 2.3
 
     - Warn for assignment to None (in various forms).
 
+    - PEP 218  Adding a Built-In Set Object Type            Wilson
+
+      Alex Martelli contributed a new version of Greg Wilson's
+      prototype, and I've reworked that quite a bit.  It's in the
+      standard library now as the module "sets", although some details
+      may still change until the first beta release.  (There are no
+      plans to make this a built-in type, for now.)
+
 
 Planned features for 2.3
 
@@ -101,12 +109,6 @@ Planned features for 2.3
       core module; maybe the whole thing should become a package).
       http://www.python.org/sf/578494
 
-    - PEP 218  Adding a Built-In Set Object Type            Wilson
-
-      I think it would be good to revive this in some form, using a
-      module rather than a built-in type.  Alex Martelli has
-      contributed a new version: http://www.python.org/sf/580995
-
     - A new command line option parser.  Greg Ward's Optik
       (http://optik.sf.net) fits the bill fine; there's only some
       question about whether it should be given a less "cutesy" name.