[css-ruby] Fix bikeshed markup.

Author: fantasai

css-ruby/Overview.bs

@@ -52,7 +52,7 @@ Values</h3>
 	this specification are defined in CSS Level 2 Revision 1 [[!CSS21]].
 	Other CSS modules may expand the definitions of these value types: for
 	example [[CSS3VAL]], when combined with this module, expands the
-	definition of the <var>&lt;length&gt;</var> value type as used in this specification.</p>
+	definition of the <<length>> value type as used in this specification.</p>
 
 	<p>In addition to the property-specific values listed in their definitions,
 	all properties defined in this specification also accept the
@@ -161,7 +161,7 @@ Ruby-specific 'display' Values</h3>
 	authors must map document language elements to ruby elements;
 	this is done with the 'display' property.
 
-	<pre class="propdef partial">
+	<pre class=propdef partial>
 	Name: display
 	New values: ruby | ruby-base | ruby-text | ruby-base-container | ruby-text-container
 	</pre>