clarify that start and end punctuation hanging is allowed on the same line

Author: fantasai

css3-text/Overview.html

@@ -89,7 +89,7 @@ <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 30 March 2011</h2>
     <dt>This version:
 
     <dd><a href="http://dev.w3.org/csswg/css3-text/Overview.html">$Date:
-     2011/03/30 00:20:11 $ (CVS $Revision$)</a> <!--
+     2011/03/30 00:22:00 $ (CVS $Revision$)</a> <!--
       <dd><a href="http://www.w3.org/TR/2011/WD-css3-text-20110330/">http://www.w3.org/TR/2011/WD-css3-text-20110330/</a></dd>
     -->
 
@@ -4289,8 +4289,8 @@ <h3 id=hanging-punctuation><span class=secno>10.2. </span> Hanging
    punctuation mark is part of the justified contents; it is just not
    measured when determining how much the contents need to be expanded or
    compressed.) Depending on the line's alignment, this can push the mark
-   outside the line box. In all cases only one punctuation character may hang
-   outside the edge of the line.
+   outside the line box. At most one punctuation character may hang outside
+   each edge of the line.
 
   <p class=note>Note that if there is not sufficient padding on the block
    container, hanging punctuation can trigger overflow.

css3-text/Overview.src.html

@@ -3177,8 +3177,8 @@ <h3 id="hanging-punctuation">
       measured when determining how much the contents need to be expanded or
       compressed.)
       Depending on the line's alignment, this can push the mark outside the
-      line box. In all cases only one punctuation character may hang outside
-      the edge of the line.
+      line box. At most one punctuation character may hang outside each edge
+      of the line.
 
     <p class="note">Note that if there is not sufficient padding on the
       block container, hanging punctuation can trigger overflow.</p>