[css-multicol] export terminology

Author: frivoal

css-multicol-2/Overview.bs

@@ -360,8 +360,8 @@ The multi-column model</h2>
 
 	The column boxes are ordered
 	in the [=inline base direction=] of the multicol container
-	and arranged into <dfn lt="multi-column row | multi-col row | multicol row">multicol rows</dfn>.
-	A multicol row contains at least one <dfn lt="multi-column line | multi-col line | multicol line">multicol line</dfn>
+	and arranged into <dfn lt="multi-column row | multi-col row | multicol row" export>multicol rows</dfn>.
+	A multicol row contains at least one <dfn lt="multi-column line | multi-col line | multicol line" export>multicol line</dfn>
 	or spanning element.
 	The <dfn export>column width</dfn> is the length of the column box in the inline direction.
 	The <dfn export>column height</dfn> is the length of the column box in the block direction.