[css-grid] Update DoC

Author: fantasai

css-grid/issues-cr-2016.bsi

@@ -169,5 +169,5 @@ Issue 21.
 Summary:  Stretch vs. start is replaced elements or boxes with aspect ratio?
 From:     Mats Palmgren
 Comment:  https://github.com/w3c/csswg-drafts/issues/523#issuecomment-275869984
-Open
+Open:     =WG= Discuss and re-resolve more clearly.
 ----

css-grid/issues-cr-2016.html

@@ -202,7 +202,7 @@ <h1>CSS Grid Layout Level 1 Disposition of Comments for 2016-09-29 CR</h1>
 <span>Summary:  Stretch vs. start is replaced elements or boxes with aspect ratio?</span>
 <span>From:     Mats Palmgren</span>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/523#issuecomment-275869984'>https://github.com/w3c/csswg-drafts/issues/523#issuecomment-275869984</a></span>
-<span>Open</span></pre>
+<span class="">Open:     =WG= Discuss and re-resolve more clearly.</span></pre>
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