[css-grid] Update DoC

Author: fantasai

css-grid/issues-wd-20150917.bsi

@@ -395,14 +395,15 @@ Issue 47.
 Summary:  Add subgrids to placement algorithm
 From:     Igalia
 Comment:  http://blogs.igalia.com/mrego/2016/02/12/subgrids-thinking-out-loud/
-Open:     =TF= Edit
+Response: https://lists.w3.org/Archives/Public/www-style/2016Feb/0338.html
+Closed:   Accepted
 ----
 Issue 48.
 Summary:  Define grid-gap effects on subgrids
 From:     François Remy
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Jan/0141.html
 Response: https://lists.w3.org/Archives/Public/www-style/2016Feb/0338.html
-Open:     =TF= Define gaps to match parent always.
+Closed:   Accepted
 ----
 Issue 49.
 Summary:  Handle auto-flow subgridded catalogs