[css-grid-1] Update changes section. w3c#6278 (comment)

Author: fantasai

css-grid-1/Overview.bs

@@ -4769,12 +4769,13 @@ Changes since the <a href="https://www.w3.org/TR/2020/CRD-css-grid-1-20201218/">
 			(<a href="https://github.com/w3c/csswg-drafts/issues/6278">Issue #6278</a>)
 			<blockquote>
 				<p>In all cases, the size suggestion is additionally clamped by the [=maximum size=] in the affected axis,
-				if it's definite.
+				if it's [=definite=].
 				<ins>If the item is a [[css-sizing-3#min-content-zero|compressible replaced element]],
-				the size suggestion is clamped by both the [=maximum size=] and the [=preferred size=],
-				whichever are definite,
-				with their indefinite percentages resolved for this purpose against zero
-				(and therefore considered definite).</ins></p>
+				and has a [=definite=] [=preferred size=] or [=maximum size=]
+				in the relevant axis,
+				the size suggestion is capped by those sizes;
+				for this purpose, any indefinite percentages in these sizes
+				are resolved against zero (and considered [=definite=]).</ins></p>
 			</blockquote>
 
 		<li id="change-2020-auto-min-transferred-clamp">
@@ -4791,11 +4792,11 @@ Changes since the <a href="https://www.w3.org/TR/2020/CRD-css-grid-1-20201218/">
 				converted through the aspect ratio.
 				It is otherwise undefined.</p>
 
-				<p><ins>If the item’s has a [=preferred size=] or [=maximum size=]
+				<p><ins>If the item’s has a [=definite=] [=preferred size=] or [=maximum size=]
 				in the relevant axis,
-				the [=transferred size suggestion=] is capped by those sizes,
-				resolving any indefinite percentages in these sizes
-				against zero for this purpose.</ins></p>
+				the [=transferred size suggestion=] is capped by those sizes;
+				for this purpose, any indefinite percentages in these sizes
+				are resolved against zero (and considered [=definite=]).</ins></p>
 			</blockquote>
 
 		<li id="change-2020-auto-margins">