Add missing piece

Author: noamr

css-view-transitions-2/Overview.bs

@@ -478,7 +478,7 @@ Note: as per default behavior, the ''@view-transition'' rule can be nested insid
 	A {{Document}} additionaly has:
 
 	<dl dfn-for=document>
-		: <dfn export>inbound view-transition steps</dfn>
+		: <dfn export>inbound view transition steps</dfn>
 		:: Null or an algorithm accepting nothing, initially null.
 	</dl>
 
@@ -637,10 +637,16 @@ When capturing the old or new state for an element, perform the following steps
 
 				1. Let |initialSnapshotContainingBlockSize| to |outboundTransition|'s [=ViewTransition/initial snapshot containing block size=].
 
-				1. Set |newDocument|'s [=inbound view-transition steps=] to the following steps:
+				1. Set |newDocument|'s [=inbound view transition steps=] to the following steps:
 
 					1. [=Assert=]: |newDocument| is [=fully active=].
 
+					1. Set |newDocument|'s [=inbound view transition steps=] to null.
+
+					1. If |newDocument|'s [=active view transition=] is not null, then return.
+
+						Note: this means that starting a same-document transition before revealing the document would cancel a pending cross-document transition.
+
 					1. Let |inboundTransition| be a new {{ViewTransition}} in |newDocument|'s [=relevant Realm=],
 						whose [=ViewTransition/named elements=] is |clonedNamedElements|,
 						and [=ViewTransition/initial snapshot containing block size=] is |initialSnapshotContainingBlockSize|.
@@ -684,9 +690,9 @@ When capturing the old or new state for an element, perform the following steps
 	<div algorithm>
 		To <dfn export>resolve cross-document view-transition</dfn> for {{Document}} |document|:
 
-		1. If |document|'s [=inbound view-transition steps=] is null, then return.
+		1. If |document|'s [=inbound view transition steps=] is null, then return.
 
-		1. Let |transition| be the result of running |document|'s [=inbound view-transition steps=].
+		1. Let |transition| be the result of running |document|'s [=inbound view transition steps=].
 
 		1. If |transition| is null then return null.