revising list of unimplemented features, revising keyword names to match implementations

Author: howcome

css-gcpm/Overview.src.html

@@ -197,19 +197,19 @@ <h4>Setting named strings: the 'string-set' property</h4>
 
 <dd class=unimplemented>The textual content of the element, including the content of its ::before and ::after pseudo-element. The content of the element's descendants, including their respective ::before and ::after pseudo-elements, are included in the returned content.
 
-<dt><!--content-element-->content()
+<dt><!--content-element-->content
 
 <dd>The textual content of the element, not including the content of its ::before and ::after pseudo-element. The content of the element's descendants, including their respective ::before and ::after pseudo-elements, are included in the returned content.
 
-<dt><!--content-before-->content(before)
+<dt><!--content-before-->before
 
 <dd>The textual content of the ::before pseudo-element the content of the element.
 
-<dt><!--content-after-->content(after)
+<dt><!--content-after-->after
 
 <dd>The textual content of the ::after pseudo-element the content of the element.
 
-<dt><!--content-first-letter-->content(first-letter)
+<dt><!--content-first-letter-->first-letter
 
 <dd>The first letter of the content of the element. The definition of a letter is the same as for :first-letter pseudo-elements.