Fixed property definitions (addressing comments by @tabatkins)

css-ruby/Overview.bs

@@ -160,7 +160,7 @@ Ruby-specific 'display' Values</h3>
 	authors must map document language elements to ruby elements;
 	this is done with the 'display' property.
 
-	<pre class="propdef">
+	<pre class="propdef partial">
 	Name: display
 	New values: ruby | ruby-base | ruby-text | ruby-base-container | ruby-text-container
 	</pre>
@@ -895,7 +895,7 @@ Ruby Positioning: the 'ruby-position' property</h3>
 
 	<pre class="propdef">
 	Name: ruby-position
-	Value: [ over | under | inter-character ]
+	Value: over | under | inter-character
 	Initial: over
 	Applies to: ruby annotation containers
 	Inherited: yes
@@ -1048,7 +1048,6 @@ Ruby Text Distribution: the 'ruby-align' property</h3>
 	Initial: space-around
 	Applies to: ruby bases, ruby annotations, ruby base containers, ruby annotation containers
 	Inherited: yes
-	Computed value: specified value (except for ''initial'' and ''inherit'')
 	</pre>
 
 	<p>This property specifies how text is distributed within the various ruby boxes