[css-inline-3] text-box applies to mutlicol containers, too w3c#5335

Author: fantasai

css-inline-3/Overview.bs

@@ -1372,7 +1372,7 @@ Shorthand for Text Box Trimming: the 'text-box' property</h3>
 	Name: text-box
 	Value: normal | <<'text-box-trim'>> || <<'text-box-edge'>>
 	Initial: normal
-	Applies to: [=block containers=] and [=inline boxes=]
+	Applies to: [=block containers=], [=multi-column containers=], and [=inline boxes=]
 	Inherited: no
 	Percentages: N/A
 	Computed value: the specified keyword
@@ -1397,7 +1397,7 @@ Trimming Over/Under Text: the 'text-box-trim' property</h3>
 	Name: text-box-trim
 	Value: none | trim-start | trim-end | trim-both
 	Initial: none
-	Applies to: block containers and [=inline boxes=]
+	Applies to: [=block containers=], [=multi-column containers=], and [=inline boxes=]
 	Inherited: no
 	Percentages: N/A
 	Computed value: the specified keyword