[css-grid] Link whitespace, don't mention CSS escapes.

Author: tabatkins

css-grid/Overview.html

@@ -1288,7 +1288,7 @@ <h3 class="heading settled heading" data-level=5.2 id=grid-template-areas-proper
 					representing a <dfn data-dfn-type=dfn data-noexport="" id=null-cell-token>null cell token<a class=self-link href=#null-cell-token></a></dfn>.
 
 				<li>
-					A sequence of whitespace,
+					A sequence of <a data-link-type=dfn href=http://dev.w3.org/csswg/css-syntax-3/#whitespace title=whitespace>whitespace</a>,
 					representing nothing
 					(do not produce a token).
 
@@ -1297,9 +1297,7 @@ <h3 class="heading settled heading" data-level=5.2 id=grid-template-areas-proper
 					representing a <dfn data-dfn-type=dfn data-noexport="" id=trash-token>trash token<a class=self-link href=#trash-token></a></dfn>.
 			</ul>
 
-<p class=note>			Note: Other CSS syntax, such as character escapes, is not valid within a row string.
-			(The \ character that would start a character escape produces a trash token instead.)
-			These rules can produce cell names that do not match the <a class="production css-code" data-link-type=type href=http://dev.w3.org/csswg/css-values-3/#ltident title="<ident>">&lt;ident&gt;</a> syntax,
+<p class=note>			Note: These rules can produce cell names that do not match the <a class="production css-code" data-link-type=type href=http://dev.w3.org/csswg/css-values-3/#ltident title="<ident>">&lt;ident&gt;</a> syntax,
 			such as "1st 2nd 3rd",
 			which requires escaping when referencing those areas by name in other properties,
 			like <a class=css data-link-type=propdesc href=#propdef-grid-row title=grid-row>grid-row: \31st;</a> to reference the area named <span class=css data-link-type=maybe title=1st>1st</span>.

css-grid/Overview.src.html

@@ -1214,7 +1214,7 @@ <h3 id="grid-template-areas-property">
 					representing a <dfn>null cell token</dfn>.
 
 				<li>
-					A sequence of whitespace,
+					A sequence of <a>whitespace</a>,
 					representing nothing
 					(do not produce a token).
 
@@ -1223,9 +1223,7 @@ <h3 id="grid-template-areas-property">
 					representing a <dfn>trash token</dfn>.
 			</ul>
 
-			Note: Other CSS syntax, such as character escapes, is not valid within a row string.
-			(The \ character that would start a character escape produces a trash token instead.)
-			These rules can produce cell names that do not match the <<ident>> syntax,
+			Note: These rules can produce cell names that do not match the <<ident>> syntax,
 			such as "1st 2nd 3rd",
 			which requires escaping when referencing those areas by name in other properties,
 			like ''grid-row: \31st;'' to reference the area named ''1st''.