[css-grid] Per WG resolution, make a sequence of '.'s a null cell token (not just one).

Author: tabatkins

css-grid/Overview.bs

@@ -320,13 +320,13 @@ Grid Layering of Elements</h3>
 			* items.  The line names are assigned on either side of a column
 			* or row sizing function where the line would logically exist. */
 			grid-template-columns:
-				(start)        auto
-				(track-start)  0.5fr
-				(thumb-start)  auto
-				(fill-split)   auto
-				(thumb-end)    0.5fr
-				(track-end)    auto
-				(end);
+				[start]        auto
+				[track-start]  0.5fr
+				[thumb-start]  auto
+				[fill-split]   auto
+				[thumb-end]    0.5fr
+				[track-end]    auto
+				[end];
 		}
 
 		/* The grid-placement properties accept named lines. Below the
@@ -1500,7 +1500,7 @@ Named Areas: the 'grid-template-areas' property</h3>
 					representing a <dfn>named cell token</dfn>
 					with a name consisting of its code points.
 				<li>
-					A "." (U+002E FULL STOP),
+					A sequence of one or more "." (U+002E FULL STOP),
 					representing a <dfn>null cell token</dfn>.
 
 				<li>
@@ -1558,7 +1558,7 @@ Named Areas: the 'grid-template-areas' property</h3>
 				display: grid;
 				grid-template-areas: "head head"
 				                     "nav  main"
-				                     "foot .   "
+				                     "foot ...."
 			}
 			#grid > header { grid-area: head; }
 			#grid > nav    { grid-area: nav; }
@@ -3625,6 +3625,8 @@ Changes</h2>
 	* A <a>subgrid</a> now only ignores width/height/alignment constraints in the subgridded dimension(s).
 	* Made ''repeat(auto)'' pay attention to max size when it's definite, too.
 	* Per WG resolution, switched to using square brackets for <<line-names>>, rather than parentheses.
+	* Per WG resolution, made a *sequence* of "." characters a single <a>null cell token</a>,
+		so authors can match the number of dots to the width of the column.
 
 
 <h3 id="changes-20140513">