Faster and simpler _replace() method
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index d5f4283..d782c69 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -402,7 +402,7 @@
 
            def _replace(self, **kwds):
                'Return a new Point object replacing specified fields with new values'
-               return Point(**dict(zip(('x', 'y'), self), **kwds))
+               return Point(*map(kwds.get, ('x', 'y'), self))
 
            x = property(itemgetter(0))
            y = property(itemgetter(1))