Normalize CSS3COL references to avoid duplicate IDs

Author: fantasai

css3-writing-modes/Overview.html

@@ -1864,7 +1864,7 @@ <h4 id=orthogonal-pagination><span class=secno>6.3.3. </span> Paginating
   <p>With regards to pagination, the rules in CSS2.1 still hold in vertical
    writing modes and orthogonal flows: page break opportunities do not occur
    inside line boxes, only between them. Note that UAs that support <a
-   href="#CSS3COL" rel=biblioentry>[CSS3COL]<!--{{CSS3COL}}--></a> may break
+   href="#CSS3COL" rel=biblioentry>[CSS3COL]<!--{{!CSS3COL}}--></a> may break
    between columns, however. <span class=issue>Does CSS3 Multicol specify
    this <a
    href="http://lists.w3.org/Archives/Public/www-style/2007Nov/0112.html">as
@@ -2317,16 +2317,6 @@ <h3 class=no-num id=other-references>Other references</h3>
    <dt style="display: none"><!-- keeps the doc valid if the DL is empty -->
     <!---->
 
-   <dt id=CSS3COL>[CSS3COL]
-
-   <dd>H&#229;kon Wium Lie. <a
-    href="http://www.w3.org/TR/2009/CR-css3-multicol-20091217"><cite>CSS
-    Multi-column Layout Module.</cite></a> 17 December 2009. W3C Candidate
-    Recommendation. (Work in progress.) URL: <a
-    href="http://www.w3.org/TR/2009/CR-css3-multicol-20091217">http://www.w3.org/TR/2009/CR-css3-multicol-20091217</a>
-    </dd>
-   <!---->
-
    <dt id=CSS3PAGE>[CSS3PAGE]
 
    <dd>Melinda Grant; H&#229;kon Wium Lie. <a

css3-writing-modes/Overview.src.html

@@ -1356,7 +1356,7 @@ <h4 id="orthogonal-pagination">
   <p>With regards to pagination, the rules in CSS2.1 still hold in
     vertical writing modes and orthogonal flows: page break opportunities
     do not occur inside line boxes, only between them. Note that UAs
-    that support [[CSS3COL]] may break between columns, however.
+    that support [[!CSS3COL]] may break between columns, however.
     <span class="issue">Does CSS3 Multicol specify this <a href="http://lists.w3.org/Archives/Public/www-style/2007Nov/0112.html">as requested</a>?</span>
 
   <p>Note that if content spills outside the pagination stream