[css-contain] Move info on content-visibility animations from L3 to L2

See w3c#8627

Author: frivoal

css-contain-2/Overview.bs

@@ -1618,7 +1618,7 @@ Suppressing An Element's Contents Entirely: the 'content-visibility' property {#
 	Initial: visible
 	Inherited: no
 	Applies to: elements for which [=size containment=] can apply
-	Animation type: not animatable
+	Animation type: see [[#content-visibility-animation]]
 	</pre>
 
 	<wpt>
@@ -2040,6 +2040,18 @@ Suppressing An Element's Contents Entirely: the 'content-visibility' property {#
 
 	</div>
 
+<h3 id='content-visibility-animation'>
+Animating and Interpolating 'content-visibility'</h3>
+
+	In general,
+	the 'content-visibility' property’s [=animation type=] is [=discrete=].
+	However,
+	similar to interpolation of 'visibility'
+	(see [[web-animations-1#animating-visibility]]),
+	during interpolation between ''content-visibility/hidden''
+	and any other 'content-visibility' value,
+	<var ignore>p</var> values between 0 and 1
+	map to the non-''content-visibility/hidden'' value.
 
 <h3 id='using-cv-hidden'>
 Using ''content-visibility: hidden''</h3>
@@ -2646,6 +2658,8 @@ Changes from <a href="https://www.w3.org/TR/2022/WD-css-contain-2-20220917/">202
 * Move the definition of inline-size containement from the Level 3 specification
 	to this Level 2.
 	(<a href="https://github.com/w3c/csswg-drafts/issues/10433">Issue 10433</a>)
+* Make the 'content-visibility' property animatable.
+	(<a href="https://github.com/w3c/csswg-drafts/issues/8627">Issue 8627</a>)
 
 <h3 id="changes-since-2020-12-16">
 Changes from <a href="https://www.w3.org/TR/2020/WD-css-contain-2-20201216/">2020-12-16 Working Draft</a>

css-contain-3/Overview.bs

@@ -946,30 +946,8 @@ The <code>CSSContainerRule</code> interface</h3>
 Suppressing An Element’s Contents Entirely: the 'content-visibility' property {#content-visibility}
 =================
 
-	<pre class=propdef>
-	Name: content-visibility
-	Value: visible | auto | hidden
-	Initial: visible
-	Inherited: no
-	Applies to: elements for which [=size containment=] can apply
-	Animation type: see [[#content-visibility-animation]]
-	</pre>
-
 	Issue: [[css-contain-2#content-visibility]]
 
-<h3 id='content-visibility-animation'>
-Animating and Interpolating 'content-visibility'</h3>
-
-	In general,
-	the 'content-visibility' property’s [=animation type=] is [=discrete=].
-	However,
-	similar to interpolation of 'visibility'
-	(see [[web-animations-1#animating-visibility]]),
-	during interpolation between ''content-visibility/hidden''
-	and any other 'content-visibility' value,
-	<var>p</var> values between 0 and 1
-	map to the non-''content-visibility/hidden'' value.
-
 Privacy Considerations {#privacy}
 =================================
 
@@ -1007,8 +985,6 @@ Changes since the 18 August 2022 Working Draft</h3>
 	* Correct typo in 'container-type' syntax, to clarify that ''normal'' cannot
 		be combined with other values.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/7669">Issue 7669</a>)
-	* Make the 'content-visibility' property animatable.
-		(<a href="https://github.com/w3c/csswg-drafts/issues/8627">Issue 8627</a>)
 	* Allow ''var()'' references in [=container size queries=].
 		(<a href="https://github.com/w3c/csswg-drafts/issues/8088">Issue 8088</a>)
 	* Allow comma-separated <<container-condition>>s to match different containers.