Note additional issue about negations and @document.

Author: dbaron

css3-conditional/Overview.html

@@ -1007,6 +1007,19 @@ <h2 id=at-document><span class=secno>7. </span>Document queries: the
    forward-compatibility work differently, or is this rule the best solution
    for such future expansion anyway?</span>
 
+  <div class=issue>This syntax doesn't offer any ability to do negations,
+   which has been requested in <a
+   href="https://bugzilla.mozilla.org/show_bug.cgi?id=349813">Mozilla bug
+   349813</a>. Use cases that people have wanted negations for include:
+   <ul>
+    <li>User style sheets that want a particular rule in general, but know
+     that that rule does more harm than good on specific sites.
+
+    <li>Authors who have a rule that they want to apply to most of their
+     pages, but wish to make a few exceptions for.
+   </ul>
+  </div>
+
   <p>This extends the lexical scanner in the <a
    href="http://www.w3.org/TR/CSS21/grammar.html">Grammar of CSS 2.1</a> (<a
    href="#CSS21" rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>, Appendix G) by

css3-conditional/Overview.src.html

@@ -759,6 +759,19 @@ <h2 id="at-document">Document queries: the '@document' rule</h2>
 handling rules to make forward-compatibility work differently, or is
 this rule the best solution for such future expansion anyway?</span></p>
 
+<div class="issue">This syntax doesn't offer any ability to do negations,
+which has been requested in <a
+href="https://bugzilla.mozilla.org/show_bug.cgi?id=349813">Mozilla bug
+349813</a>.  Use cases that people have wanted negations for
+include:
+<ul>
+  <li>User style sheets that want a particular rule in general, but know
+  that that rule does more harm than good on specific sites.</li>
+  <li>Authors who have a rule that they want to apply to most of their
+  pages, but wish to make a few exceptions for.</li>
+</ul>
+</div>
+
 <p>This extends the lexical scanner in the
 <a href="http://www.w3.org/TR/CSS21/grammar.html">Grammar of CSS 2.1</a>
 ([[!CSS21]], Appendix G) by adding: