clarify that the proportional escape clause is per glyph, not per font

Author: fantasai

css3-text/Overview.html

@@ -89,7 +89,7 @@ <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 27 April 2011</h2>
     <dt>This version:
 
     <dd><a href="http://dev.w3.org/csswg/css3-text/Overview.html">$Date:
-     2011/04/25 04:37:55 $ (CVS $Revision$)</a> <!--
+     2011/04/27 01:04:53 $ (CVS $Revision$)</a> <!--
       <dd><a href="http://www.w3.org/TR/2011/WD-css3-text-20110427/">http://www.w3.org/TR/2011/WD-css3-text-20110427/</a></dd>
     -->
 
@@ -3723,8 +3723,9 @@ <h4 id=fullwidth-collapsing><span class=secno>9.3.1. </span> Fullwidth
 
   <p>Some fonts (e.g. MS PMincho) use proportional glyphs for fullwidth
    punctuation characters. In such cases, the UA should not apply text
-   spacing rules to these glyphs, and instead always set them at their
-   natural width.
+   spacing rules to proportional glyphs, and instead always set them at their
+   natural width. (In other words, their given advance width is considered
+   simultaneously trim and fully spaced.)
 
   <p class=note>The advance width of a standard Han character can be
    determined either from font metrics such as the OpenType <code>ideo</code>
@@ -3734,11 +3735,10 @@ <h4 id=fullwidth-collapsing><span class=secno>9.3.1. </span> Fullwidth
    that the characters are not square.) More information on OpenType metrics
    can be found <a
    href="http://www.microsoft.com/typography/otspec/baselinetags.htm#ideoembox">in
-   the OpenType spec</a>.
-
-  <p class=note>If 水 U+6C34, 卜 U+535C, and 一 U+4E00 do not all have the
-   same advance width, the font has proportional ideographs and the fullwidth
-   advance width cannot be reliably determined by measuring glyphs.
+   the OpenType spec</a>. Note that if 水 U+6C34, 卜 U+535C, and 一 U+4E00
+   do not all have the same advance width, the font has proportional
+   ideographs and the fullwidth advance width cannot be reliably determined
+   by measuring glyphs.
 
   <p>Unless &lsquo;<a href="#text-spacing"><code
    class=property>text-spacing</code></a>&rsquo; is set to &lsquo;<code

css3-text/Overview.src.html

@@ -2757,8 +2757,9 @@ <h4 id="fullwidth-collapsing">
 
     <p>Some fonts (e.g. MS PMincho) use proportional glyphs for fullwidth
       punctuation characters. In such cases, the UA should not apply text
-      spacing rules to these glyphs, and instead always set them at their
-      natural width.
+      spacing rules to proportional glyphs, and instead always set them at
+      their natural width. (In other words, their given advance width is
+      considered simultaneously trim and fully spaced.)
 
     <p class="note">The advance width of a standard Han character can be
       determined either from font metrics such as the OpenType <code>ideo</code>
@@ -2768,9 +2769,7 @@ <h4 id="fullwidth-collapsing">
       so that the characters are not square.) More information on OpenType
       metrics can be found <a href="http://www.microsoft.com/typography/otspec/baselinetags.htm#ideoembox">in
       the OpenType spec</a>.
-    </p>
-
-    <p class="note">If 水 U+6C34, 卜 U+535C, and 一 U+4E00 do not all have
+      Note that if 水 U+6C34, 卜 U+535C, and 一 U+4E00 do not all have
       the same advance width, the font has proportional ideographs and the
       fullwidth advance width cannot be reliably determined by measuring
       glyphs.