[css-grid-1] Fix errors introduced by 72f2bb2 and correctly define interaction with aspect ratios.

Author: fantasai

css-grid-1/Overview.bs

@@ -1119,19 +1119,18 @@ Grid Items</h2>
 		(consistent with the width calculation rules for block-level replaced elements in [[CSS2/visudet#block-replaced-width]]).
 
 		Otherwise,
-		use the [=inline size=] calculation rules for non-replaced boxes
-		(defined in [[CSS2/visudet#blockwidth]],
-		and modified by the rules for handling the 'aspect-ratio' property
-		when resolving ''width/auto'' sizes in [[CSS-SIZING-4]]).
+		if the grid item has a [=preferred aspect ratio=],
+		the grid item is sized as for a [=block-level box=].
+
+		Otherwise,
+		the grid item is sized as for ''align-self/stretch''.
 
 	: ''align-self/stretch''
 	::
 		Use the [=inline size=] calculation rules for non-replaced boxes
-		(defined in [[CSS2/visudet#blockwidth]],
-		and modified by the rules for handling the 'aspect-ratio' property
-		when resolving ''width/auto'' sizes in [[CSS-SIZING-4]]).
+		(defined in [[CSS2/visudet#blockwidth]]).
 
-		Note: This may distort the aspect ratio of the item, if it has one.
+		Note: This can distort the aspect ratio of the item, if it has one.
 
 	: all other values
 	:: Size the item as ''width/fit-content''.
@@ -4670,6 +4669,14 @@ Changes</h2>
 
 	This section documents the changes since previous publications.
 
+<h3 id="changes-202008">
+Changes since the <a href="https://www.w3.org/TR/2020/CR-css-grid-1-20200818/">18 August 2020 CR</h3>
+
+	<ul class="non-normative">
+		<li id="change-2020-align-normal-aspect-ratio">
+			Fix errors introduced by in the previous CR by an undocumented attempt to clarify [[#grid-item-sizing]] interaction with 'aspect-ratio'.
+	</ul>
+
 <h3 id="changes-2017">
 Changes since the <a href="https://www.w3.org/TR/2017/CR-css-grid-1-20171215/">15 December 2017 CR</a></h3>