[css-align-3] Allow reordering of first|last vs baseline keywords. w3c#5235

Author: fantasai

css-align-3/Overview.bs

@@ -595,7 +595,7 @@ Baseline Alignment: the ''baseline'' keyword and ''first''/''last'' modifiers</h
 	The baseline alignment keywords are represented with the <<baseline-position>> grammar term:
 
 	<pre class='prod'>
-		<dfn>&lt;baseline-position></dfn> = [ first | last ]? baseline
+		<dfn>&lt;baseline-position></dfn> = [ first | last ]? && baseline
 	</pre>
 
 	The ''first'' and ''last'' values give a box a <dfn export>baseline alignment preference</dfn>:
@@ -2392,6 +2392,12 @@ Appendix A: Static Position Terminology</h2>
 <h2 id="changes">
 Changes</h2>
 
+	Changes since the <a href="https://www.w3.org/TR/2020/WD-css-align-3-20200421/">21 April 2020 Working Draft</a> include:
+	<ul>
+		<li>Allowed reordering of ''[ first | last ]'' and ''align-self/baseline'' components of <<baseline-position>>.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/5235">Issue 5235</a>)
+	</ul>
+
 	Changes since the <a href="https://www.w3.org/TR/2018/WD-css-align-3-20181206/">6 December 2018 Working Draft</a> include:
 	<ul>
 		<li>Improved the center self-alignment of absolutely-positioned elements.