[css-content-3][editorial] Fixed Bikeshed issues

Author: SebastianZ

css-content-3/Overview.bs

@@ -502,6 +502,7 @@ Quotation Mark System: the 'quotes' property</h4>
 		quotes-032.html
 		quotes-033.html
 		quotes-034.html
+		quotes-035.html
 		quotes-first-letter-001.html
 		quotes-first-letter-002.html
 		quotes-first-letter-003.html
@@ -1318,7 +1319,7 @@ Bookmarks</h2>
 
 	Some document formats,
 	most notably PDF,
-	allow the use of <dfn>bookmarks</dfn> as an aid to navigation.
+	allow the use of <dfn export>bookmarks</dfn> as an aid to navigation.
 	Bookmarks provide a list of links to document elements,
 	as well as text to label the links and a level value.
 	A bookmark has three properties:
@@ -1478,7 +1479,7 @@ Initial Bookmark Toggle State: the 'bookmark-state' property</h3>
 			(<a href="https://github.com/w3c/csswg-drafts/issues/6124">Issue 6124</a>)
 		<li>Fixed an off-by-one error for the [=quote depth=] of closing quotes.
 			(<a href="https://github.com/w3c/csswg-drafts/issues/2506">Issue 2506</a>)
-		<li>Inlined the definition of ''attr()'', since it has been dropped from [[CSS-VALUES-4]].
+		<li>Inlined the definition of ''content/attr()'', since it has been dropped from [[CSS-VALUES-4]].
 		<li>Added Web Platform Tests coverage.
 		<li>Miscellaneous editorial spec clean up.
 	</ul>