[css-grid-1][css-grid-2] Export term 'collapsed grid track'.

Author: fantasai

css-grid-1/Overview.bs

@@ -1806,8 +1806,8 @@ Repeat-to-fill: ''auto-fill'' and ''auto-fit'' repetitions</h5>
 	(This can result in <em>all</em> tracks being <a>collapsed</a>,
 	if they're all empty.)
 
-	A <dfn local-lt=collapse>collapsed track</dfn> is treated as having
-	a fixed <a>track sizing function</a> of ''0px'',
+	A <dfn export local-lt="collapse | collapsed track">collapsed grid track</dfn>
+	is treated as having a fixed <a>track sizing function</a> of ''0px'',
 	and the <a>gutters</a> on either side of it--
 	including any space allotted through <a>distributed alignment</a>--
 	<a lt="collapsed gutter">collapse</a>.

css-grid-2/Overview.bs

@@ -1898,8 +1898,8 @@ Repeat-to-fill: ''auto-fill'' and ''auto-fit'' repetitions</h5>
 	(This can result in <em>all</em> tracks being <a>collapsed</a>,
 	if they're all empty.)
 
-	A <dfn local-lt=collapse>collapsed track</dfn> is treated as having
-	a fixed <a>track sizing function</a> of ''0px'',
+	A <dfn export local-lt="collapse | collapsed track">collapsed grid track</dfn>
+	is treated as having a fixed <a>track sizing function</a> of ''0px'',
 	and the <a>gutters</a> on either side of it--
 	including any space allotted through <a>distributed alignment</a>--
 	<a lt="collapsed gutter">collapse</a>.