Update PEP 374 that Mercurial has been chosen (no details yet, though).

pep-0374.txt

@@ -15,7 +15,8 @@ Post-History: 07-Nov-2008
 
 .. warning::
    This PEP is in the draft stages and is still under active
-   development.
+   development in terms of the transition plan even though Hg is the
+   chosen DVCS.
 
 
 Rationale
@@ -1457,11 +1458,11 @@ New Feature`_ scenario
 Chosen DVCS
 ===========
 
-XXX
-::
+The `decision
+<http://mail.python.org/pipermail/python-dev/2009-March/087931.html>`_
+was made at PyCon 2009 to go with Mercurial_.
 
-    import random
-    print(random.choice(['svn', 'bzr', 'hg', 'git']))
+XXX details as to why
 
 
 Transition Plan