update doc issue 12

Author: tabatkins

css-grid/issues-cr-2016.bsi

@@ -95,7 +95,7 @@ Summary:  Further concerns about automatic min size
 From:     Manuel Rego Casasnovas
 Comment:  https://github.com/w3c/csswg-drafts/issues/283#issuecomment-262481269
 Response: https://github.com/w3c/csswg-drafts/issues/283#issuecomment-268125974
-Open:     Accepted, needs edits?
+Closed:   Accepted
 Resolved: Seattle F2F
 ----
 Issue 13.