Update 512 status list (#188)

* Update 512 status list

* Add a missing newline

pep-0512.txt

@@ -715,9 +715,6 @@ Required:
 * In progress
 
   - `Notify the issue if a commit is made`_
-    (http://psf.upfronthosting.co.za/roundup/meta/issue590;
-    review committal from Ezio Melotti;
-    **blocker**)
   - `Deprecate sys._mercurial`_
     (http://bugs.python.org/issue27593;
     review committal from Ned Deily;
@@ -735,7 +732,9 @@ Required:
     **post-migration**)
 
 * Completed
-
+  
+  - Track PR status in appropriate issue
+    (http://psf.upfronthosting.co.za/roundup/meta/issue590)
   - `Update the devguide`_  (including
     `Document steps to commit a pull request`_)
     (https://github.com/python/devguide/milestone/1)