[css2] Fix title and abstract.

Author: fantasai

css2/Overview.bs

@@ -1,5 +1,5 @@
 <pre class='metadata'>
-Title: CSS 2
+Title: Cascading Style Sheets (CSS) Level 2
 Shortname: css2
 Level:
 Status: ED
@@ -32,15 +32,13 @@ Abstract:
   content positioning, table layout, features for internationalization
   and some properties related to user interface.
 
-  CSS&nbsp;2.2 is derived from and is intended to replace the
-  CSS&nbsp;2.1 and CSS2&nbsp;(1998)
-  specifications. See [[#app-changes]] for changes from CSS&nbsp;2.1,
-  and <a href="/TR/2011/REC-CSS21-2011-06-07/changes.html">appendix C of
-  CSS&nbsp;2.1 for changes from CSS2&nbsp;(1998)</a> (noting that certain CSS2&nbsp;(1998) features
-  were removed from CSS&nbsp;2 in CSS&nbsp;2.1). All future
-  specifications should refer to CSS&nbsp;2.2 when referring to CSS
-  level 2; if they wish to reference features from CSS2&nbsp;(1998) dropped in later
-  revisions they should reference the latest applicable CSS module.
+  See [[#app-changes]] for changes from CSS&nbsp;2.1,
+  and <a href="/TR/2011/REC-CSS21-2011-06-07/changes.html">appendix C of CSS&nbsp;2.1
+  for changes from CSS2&nbsp;(1998)</a>.
+  Note that several CSS2&nbsp;(1998) features
+  were removed from CSS&nbsp;2 in CSS&nbsp;2.1 due to lack of implementations;
+  specifications that wish to reference those features
+  should reference the latest applicable CSS module, see [[CSS]].
 
 Required IDs: abs-non-replaced-height, abs-non-replaced-width, absolutely-positioned,
   absolute-positioning, absrel-units, abs-replaced-height, abs-replaced-width, abstract,