[css-overflow-4] Follow up on 72e39febc3984bedfcd0554b625c68bc40df607b

Specify the effects on *auto* clamp points as well as explicit ones.
(the previous commit missed that part).

See #12665

Author: frivoal

css-overflow-4/Overview.bs

@@ -1694,9 +1694,18 @@ Handling of Excess Content: the 'continue' property</h3>
 	NOTE: This differs from the ''display: none''-like behavior
 	of not rendered content with ''continue: discard''.
 
+	Within a [=line-clamp container=],
+	floats which have not been made into [=invisible boxes=]
+	must be visually clipped to the [=content edge=]
+	of the [=line-clamp container=].
+	They do not introduce any clearance
+	that would make the [=line-clamp container=] increase its height,
+	and do not contribute to the [=scrollable overflow area=].
+
 	If a [=block container=] contains a [=clamp point=],
 	within itself or in any of its descendants,
-	its [=automatic block size=] will not take into account any invisible boxes.
+	its [=automatic block size=] will not take into account any invisible boxes,
+	nor any clipped float.
 	This also applies for the [=line-clamp container=] itself.
 
 	<wpt>
@@ -1706,14 +1715,6 @@ Handling of Excess Content: the 'continue' property</h3>
 		line-clamp-auto-005.html
 	</wpt>
 
-	Within a [=line-clamp container=],
-	floats which have not been made into [=invisible boxes=]
-	must be visually clipped to the [=content edge=]
-	of the [=line-clamp container=].
-	They do not introduce any clearance
-	that would make the [=line-clamp container=] increase its height,
-	and do not contribute to the [=scrollable overflow area=].
-
 <h4 id=discarding-content>Discarding Content</h4>
 
 			Note: ''continue: discard'', and thus this subsection, is [=at risk=]: