[css-contain-1] Use the cite attribute to tie ins/del to their amendment

Author: frivoal

css-contain-1/Overview.bs

@@ -449,7 +449,7 @@ Size Containment</h3>
 
 	<ol>
 		<li>
-			<ins class=c1>
+			<ins class=c1 cite=#c1>
 			The [=intrinsic sizes=] of the [=size containment box=]
 			are determined as if the element had no content,
 			following the same logic as when [=sizing as if empty=].
@@ -475,15 +475,15 @@ Size Containment</h3>
 			</ins>
 
 		<li>
-			<del class=c1>
+			<del class=c1 cite=#c1>
 				When calculating the size of [=size containment box=],
 				it must be treated as having no contents.
 			</del>
-			<ins class=c1>Laying out a [=size containment box=] and its content is conceptually done in two phases:</ins>
+			<ins class=c1 cite=#c1>Laying out a [=size containment box=] and its content is conceptually done in two phases:</ins>
 			<dl>
-				<dt><ins class=c1><dfn>Sizing as if empty</dfn></ins>
+				<dt><ins class=c1 cite=#c1><dfn>Sizing as if empty</dfn></ins>
 				<dd>
-					<ins class=c1>
+					<ins class=c1 cite=#c1>
 					The [=used value|used=] 'width' and 'height' of the [=size containment box|containment box=]
 					are determined as if performing a normal layout of the box,
 					except that it is treated as having no content--
@@ -560,15 +560,15 @@ Size Containment</h3>
 					contain-size-multicol-as-flex-item.html
 					</wpt>
 
-				<dt><ins class=c1><dfn>Laying out in-place</dfn></ins>
+				<dt><ins class=c1 cite=#c1><dfn>Laying out in-place</dfn></ins>
 				<dd>
-					<del class=c1>Then, its contents</del>
-					<ins class=c1>
+					<del class=c1 cite=#c1>Then, its contents</del>
+					<ins class=c1 cite=#c1>
 					The [=size containment box|containment box=]'s content
 					(including any pseudo-elements)
 					</ins>
 					must then be laid out into
-					the <ins class=c1>now fixed-size</ins> [=size containment box|containment box=]<del class=c1>'s resolved size</del><ins class=c1> normally</ins>.
+					the <ins class=c1 cite=#c1>now fixed-size</ins> [=size containment box|containment box=]<del class=c1 cite=#c1>'s resolved size</del><ins class=c1 cite=#c1> normally</ins>.
 			</dl>
 
 			Note: [=Size containment=] does not suppress baseline alignment.
@@ -626,7 +626,7 @@ Size Containment</h3>
 
 	2. When laying out the page,
 		if the [=size containment box|containment box=] is off-screen or obscured,
-		the layout of its contents <ins class=c1>(i.e. "[=laying out in-place=]") </ins>can be delayed or done at a lower priority.
+		the layout of its contents <ins class=c1 cite=#c1>(i.e. "[=laying out in-place=]") </ins>can be delayed or done at a lower priority.
 
 <h3 id='containment-layout'>
 Layout Containment</h3>