[css-grid] Update DoC

Author: fantasai

css-grid/issues-wd-20160519.bsi

@@ -134,9 +134,15 @@ Closed:    Rejected
 Verified:  reporter is spec editor
 ----
 Issue 18.
-
 Summary:   Drop comma in repeat()?
 From:      fantasai
 Comment:   https://github.com/w3c/csswg-drafts/issues/334
 Open
 ----
+Issue 19.
+Summary:   Rename -gap to -gutter
+From:      Iain
+Comment:   https://github.com/w3c/csswg-drafts/issues/353
+Closed:    Rejected
+Resolved:  Editor's discretion
+----

css-grid/issues-wd-20160519.html

@@ -167,11 +167,17 @@ <h1>CSS Grid Layout Level 1 Disposition of Comments for 2016-05-19 WD</h1>
 <span class="a">Verified:  reporter is spec editor</span></pre>
 <pre class='open ' id='issue-18'>
 <span>Issue 18. <a href='#issue-18'>#</a></span>
-<span></span>
 <span>Summary:   Drop comma in repeat()?</span>
 <span>From:      fantasai</span>
 <span>Comment:   <a href='https://github.com/w3c/csswg-drafts/issues/334'>https://github.com/w3c/csswg-drafts/issues/334</a></span>
 <span>Open</span></pre>
+<pre class=' r' id='issue-19'>
+<span>Issue 19. <a href='#issue-19'>#</a></span>
+<span>Summary:   Rename -gap to -gutter</span>
+<span>From:      Iain</span>
+<span>Comment:   <a href='https://github.com/w3c/csswg-drafts/issues/353'>https://github.com/w3c/csswg-drafts/issues/353</a></span>
+<span class="r">Closed:    Rejected</span>
+<span>Resolved:  Editor's discretion</span></pre>
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