[css-view-transitions-1][editorial] Rename show view transition pseudos boolean

Author: fantasai

css-view-transitions-1/Overview.bs

@@ -1088,7 +1088,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 
 			Note: This is used to hold dynamic styles relating to transitions.
 
-		: <dfn>show view-transition root pseudo-element</dfn>
+		: <dfn>show view transition tree</dfn>
 		:: A boolean. Initially false.
 
 			When this is true, [=this=]'s [=active view transition=]'s [=ViewTransition/transition root pseudo-element=] renders as a child of [=this=]'s [=document element=],
@@ -1382,7 +1382,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 
 		1. Let |document| be [=this's=] [=relevant global object's=] [=associated document=].
 
-		1. Set |document|'s [=show view-transition root pseudo-element=] to true.
+		1. Set |document|'s [=show view transition tree=] to true.
 
 		1. [=map/For each=] |transitionName| → |capturedElement| of |transition|'s [=ViewTransition/named elements=]:
 
@@ -1766,7 +1766,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 					and |style| is in |document|'s [=document/dynamic view transition style sheet=],
 					then remove |style| from |document|'s [=document/dynamic view transition style sheet=].
 
-		1. Set |document|'s [=document/show view-transition root pseudo-element=] to false.
+		1. Set |document|'s [=document/show view transition tree=] to false.
 
 		1. Set |document|'s [=document/active view transition=] to null.
 	</div>