[css-grid] Fix up changes list

Author: fantasai

css-grid/Overview.bs

@@ -1253,7 +1253,7 @@ Explicit Track Sizing: the 'grid-template-rows' and 'grid-template-columns' prop
 			If <var>max</var> &lt; <var>min</var>,
 			then <var>max</var> is ignored and ''minmax(min,max)'' is treated as <var>min</var>.
 			As a maximum, a <<flex>> value sets the track's <a>flex factor</a>;
-			it is invalid as a minimum
+			it is invalid as a minimum.
 
 			Note: A future level of this spec may allow <<flex>> minimums,
 			and will update the <a>track sizing algorithm</a> to account for this correctly
@@ -4118,14 +4118,6 @@ Acknowledgements</h2>
 Changes</h2>
 
 	<ul>
-		<li>
-			Simplify subgrids so that their placement can happen before sizing.
-		<li>Make ''subgrid'' a 'display' value rather than a 'grid-template-*' value,
-			disallowing single-axis subgridding.
-			(Single-axis subgridding may be added in the future,
-			but with a different syntax.)
-		<li>Remove ability to name lines within a subgrid
-			(though this may be added back in a future level).
 		<li>
 			Internal table cell display types are <a>blockified</a>
 			instead of wrapped in an anonymous table.
@@ -4146,11 +4138,24 @@ Changes</h2>
 			in a manner consistent with <a href="https://lists.w3.org/Archives/Public/www-style/2016Mar/0333.html">author expectations</a>)
 		<li>
 			Fix errors and add clarifications to <a href="#auto-repeat">auto-repeat</a> definition.
+		<li>
+			Simplify subgrids so that their placement can happen before sizing.
+		<li>
+			Make ''subgrid'' a 'display' value rather than a 'grid-template-*' value,
+			disallowing single-axis subgridding.
+			(Single-axis subgridding may be added in the future,
+			but with a different syntax.)
+		<li>
+			Remove ability to name lines within a subgrid
+			(though this may be added back in a future level).
+		<li>
+			Allow multiple track listings in 'grid-auto-rows' and 'grid-auto-columns'
+			to facilitate use of subgrids with auto-flow.
 		<li>
 			Fix handling of assumed names of <a>implicit grid lines</a>
 			to account for the “search direction”.
 		<li>
-			Added back error handling for when the start and end lines are identical.
+			Add back error handling for when the start and end lines are identical.
 		<li>
 			Corrected errors in finding the size of the implicit grid
 			in the <a>auto-placement algorithm</a>.