[css-grid-2] Add Changes list

Author: fantasai

css-grid-2/Overview.bs

@@ -87,7 +87,7 @@ Subgrids</h2>
 	</div>
 
 <h3 id="subgrid-per-axis">
-Establishing a Subgrid: Per-Axis Proposal</h3>
+Establishing a Subgrid</h3>
 
 	<a>Subgrids</a> provide the ability to pass grid parameters down through nested elements,
 	and content-based sizing information back up to their parent grid.
@@ -647,7 +647,7 @@ Aspect-ratio&ndash;controlled Gutters</h2>
 			If both 'align-content' and 'justify-content' have <<number>> values,
 			then 'justify-content'’s <<number>> value is ignored
 			and its <<content-distribution>> value honored as if specified alone.
-			If no <<content-distribution>> value was specified,
+			fIf no <<content-distribution>> value was specified,
 			then 'justify-content' takes 'align-content'’s <<content-distribution>> value
 			(if one was specified)
 			and otherwise falls back to ''space-between''.
@@ -685,6 +685,22 @@ Aspect-ratio&ndash;controlled Gutters</h2>
 		</pre>
 	</div>
 
+<h2 id="changes">
+Changes</h2>
+
+<h2 class="no-num" id="changes">Changes</h2>
+
+	<h3 class="no-num" id="changes-20180427">
+	Changes since the
+	<a href="https://www.w3.org/TR/2018/WD-css-grid-2-20180427/">April 2018
+	CSS Grid Layout Level 2 Working Draft</a></h3>
+
+	<ul>
+		<li>Added back syntax for specifying subgrid-local line names.
+		<li>Defined that subgrid’s own gap properties are honored, and how exactly that works.
+		<li>Clarified interactions of parent line names and subgrid line names.
+	</ul>
+
 <h2 id="acknowledgements">
 Acknowledgements</h2>