[css2] Added expectation that there will be a WDÂ before the PR.

--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%402875

Author: bert-github

css2/cover.src

@@ -140,9 +140,12 @@ this: &#8220;[CSS21] <em>&hellip;summary of
 comment&hellip;</em>&#8221;</p>
 
 <p>This document incorporates <a
-href="/Style/css2-updates/CR-CSS21-20070719-errata.html">
-corrections</a> made as a result of implementation experience since
-July 2007 (the previous publication).
+href="/Style/css2-updates/CR-CSS21-20070719-errata.html"> errata</a>
+resulting from implementation experience since the previous
+publication. Some of the corrections remove ambiguities or change the
+behavior in edge cases, and therefore it is expected that another
+Working Draft will (briefly) precede the Proposed Recommendation, in
+order to invite more review.
 
 <p>This document was produced by the <a
 href="/Style/CSS/members">CSS Working Group</a> (part