[css-grid] fix w3c#196 - baseline wording tweaks by mats

Author: fantasai

css-grid/Overview.bs

@@ -3351,28 +3351,29 @@ Aligning the Grid: the 'justify-content' and 'align-content' properties</h3>
 <h3 id='grid-baselines'>
 Grid Container Baselines</h3>
 
-	The first/last baselines of a <a>grid container</a> are determined as follows:
+	The first (last) baselines for each axis of a <a>grid container</a>
+	are determined as follows:
 
 	<ol>
 		<li>
-			If any of the <a>grid items</a> whose areas intersect the <a>grid container</a>’s first/last row/column
+			If any of the <a>grid items</a> whose areas intersect the <a>grid container</a>’s first (last) row/column
 			<a href="#baseline-participation">participate in baseline alignment</a>,
 			the grid container's <a>baseline set</a> in that axis
 			is <a lt="generate baselines">generated</a> from
 			the shared <a>alignment baseline</a> of those <a>grid items</a>.
 
 		<li>
-			Otherwise, if the grid container has at least one <a>grid item</a> whose area intersects the first/last row/column,
-			and the first/last such <a>grid item</a> (in <a>grid order</a>)
+			Otherwise, if the grid container has at least one <a>grid item</a> whose area intersects the first (last) row/column,
+			and the first (last) such <a>grid item</a> (in <a>grid order</a>)
 			has a baseline set parallel to the relevant axis,
-			the grid container's first/last baseline set in that axis
+			the grid container's first (last) baseline set in that axis
 			is <a lt="generate baselines">generated</a> from
 			that <a>grid item</a>’s <a>alignment baseline</a>.
 
 		<li>
-			Otherwise, the grid container's first/last baseline set
+			Otherwise, the grid container's first (last) baseline set
 			is <a lt="synthesize baselines">synthesized</a>
-			from the first/last item's (in <a>grid order</a>) content box,
+			from the first (last) item's (in <a>grid order</a>) content box,
 			or, if there's no <a>grid item</a>,
 			from the grid container's content box.
 	</ol>