[css-text-4] Update Changes list, add issue.

Author: fantasai

css-text-4/Overview.bs

@@ -39,6 +39,8 @@ White Space Processing</h2>
 <h3 id="white-space-collapsing">
 White Space Collapsing: the 'text-space-collapse' property</h3>
 
+	ISSUE: This section is still under discussion and may change in future drafts.
+
 	<pre class="propdef">
 	Name: text-space-collapse
 	Value: collapse | discard | preserve | preserve-breaks | preserve-spaces
@@ -1535,4 +1537,20 @@ Edge Effects</h2>
 <h2 class="no-num" id="acknowledgements">
 Acknowledgements</h2>
 
-	Note: Add final level 3 list, with Randy Edmunds and Florian Rivoal added
+	Note: Add final level 3 list, with Randy Edmunds, Florian Rivoal, and Pierre-Anthony Lemieux added.
+
+<h2 class="no-num" id="changes">
+Changes</h2>
+
+	Changes since the last Working Draft publication include:
+	<ul>
+		<li>Adding 'line-padding'.
+		<li>Adding 'text-group-align'.
+		<li>Adding ''text-spacing: space-first''.
+		<li>Allow truncating the 'hypehate-character'.
+		<li>Rename ''text-wrap: normal'' to ''text-wrap: wrap'' for consistency with 'flex-wrap'.
+		<li>Drop ''preserve-auto'' and ''preserve-trim'' from 'text-space-collapse'.
+		<li>Redefine ''text-wrap: balance'' in terms of remaining space.
+		<li>Note various issues on ''text-wrap: <<string>>''.
+		<li>Miscellaneous minor fixes.
+	</ul>