[css-grid] Rewrite issue about auto margins vs alignment properties.

--HG--
extra : rebase_source : ead06da1ccac5bef01b249182b5f2e26de88b49d

Author: tabatkins

css-grid/Overview.html

@@ -2525,13 +2525,8 @@ <h2 id=alignment><span class=secno>7. </span> Alignment</h2>
    symmetric for both the width and height of the <a
    href="#grid-item"><i>Grid item</i></a>.
 
-  <p class=issue> The preceding paragraph seems inconsistent with Flexbox. In
-   Flexbox, auto margins effectively "turn off" stretch entirely, so
-   underflowing items get aligned per the margins and overflowing items
-   overflow the line (rather than being shrunk to the size of the line). In
-   the preceding paragraph, it seems that stretched grid items will always
-   grow/shrink to the size of the grid area regardless of margins. I believe
-   we want the Flexbox behavior.
+  <p class=issue> Rewrite this section to make sure that auto margins vs
+   alignment work the same as in Flexbox - auto margins win.
 
   <h3 id=auto-margins><span class=secno>7.1. </span> Aligning with ‘<a
    href="#track-size-auto"><code class=css>auto</code></a>’ margins</h3>

css-grid/Overview.src.html

@@ -1972,15 +1972,7 @@ <h2 id='alignment'>
 		of the <i>Grid item</i>.
 
 	<p class='issue'>
-		The preceding paragraph seems inconsistent with Flexbox.
-		In Flexbox, auto margins effectively "turn off" stretch entirely,
-		so underflowing items get aligned per the margins
-		and overflowing items overflow the line
-		(rather than being shrunk to the size of the line).
-		In the preceding paragraph,
-		it seems that stretched grid items will always grow/shrink to the size of the grid area
-		regardless of margins.
-		I believe we want the Flexbox behavior.
+		Rewrite this section to make sure that auto margins vs alignment work the same as in Flexbox - auto margins win.
 
 
 <h3 id='auto-margins'>