[css-grid-1] Update Changes / fix indentation

Author: fantasai

css-grid-1/Overview.bs

@@ -4533,21 +4533,32 @@ Major Changes</h4>
 				its grid area must be <a>clamped</a> to within this limited grid.
 			</blockquote>
 
-        <li id="change-2018-line-name-auto">
-            Exclude 'auto' from line name <<custom-ident>>.
-            (<a href="https://github.com/w3c/csswg-drafts/issues/2856">Issue 2856</a>)
-
-        <li id="change-2018-static-padding">
-		The static position of a grid container child
-		should be resolved against the content edge, not padding edge, of the grid container.
-		(<a href="https://github.com/w3c/csswg-drafts/issues/3020">Issue 3020</a>)
-		<blockquote>
-			<p>The <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">static position</a> [[!CSS21]]
+		<li id="change-2017-line-name-auto">
+			Exclude 'auto' from line name <<custom-ident>>.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/2856">Issue 2856</a>)
+
+		<li id="change-2017-area-normalization">
+			Required that the <a>specified value</a> of 'grid-template-areas'
+			normalize <a>null cell tokens</a> and <a>whitespace</a>.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/3261">Issue 3261</a>)
+			<blockquote>
+				<ins><p>Both the <a>specified value</a> and <a>computed value</a>
+				of a <<string>> value of 'grid-template-areas' serializes
+				each <a>null cell token</a> as a single "." (U+002E FULL STOP)
+				and each sequence of <a>whitespace</a> as a single space (U+0020 SPACE).</p></ins>
+			</blockquote>
+
+		<li id="change-2017-static-padding">
+			The static position of a grid container child
+			should be resolved against the content edge, not padding edge, of the grid container.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/3020">Issue 3020</a>)
+			<blockquote>
+				<p>The <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">static position</a> [[!CSS21]]
 				of an absolutely-positioned child of a <a>grid container</a>
 				is determined as if it were the sole grid item
 				in a <a>grid area</a>
 				whose edges coincide with the <del>padding</del> <ins>content</ins> edges of the <a>grid container</a>.
-		</blockquote>
+			</blockquote>
 	</ul>
 
 <h4 id="clarify-2017">