Update hanging-punctuation definition per discussions at F2F and with Murakami-san afterward

Author: fantasai

css3-text/Overview.src.html

@@ -2852,7 +2852,7 @@ <h3 id="hanging-punctuation"><span class="secno">9.2</span>
         </tr>
         <tr>
           <th>Value:</th>
-          <td>none | [ start || end || end-edge ]
+          <td>none | [ first || last || [ allow-end | force-end ] ]
           </td>
         </tr>
         <tr>
@@ -2861,7 +2861,7 @@ <h3 id="hanging-punctuation"><span class="secno">9.2</span>
         </tr>
         <tr>
           <th>Applies to:</th>
-          <td>block-level, inline-block elements and table cells</td>
+          <td>all elements</td>
         </tr>
         <tr>
           <th>Inherited:</th>
@@ -2884,23 +2884,31 @@ <h3 id="hanging-punctuation"><span class="secno">9.2</span>
 
     <p>This property determines whether a punctuation mark, if one is present,
       may be placed outside the line box at the start or at the end of a
-      full line of text. <span class="issue">If a justified line can fit the
-      punctuation will it expand to push it outside the content area? No. What if
-      the line ends in multiple punctuation marks? Which punctuation marks are
-      affected?</span>
+      full line of text.
       Values have the following meanings:</p>
 
     <dl>
-      <dt><dfn title="hanging-punctuation:start"><code>start</code></dfn></dt>
-        <dd>Punctuation may hang outside the start edge of the first line.</dd>
-      <dt><dfn title="hanging-punctuation:end"><code>end</code></dfn></dt>
-        <dd>Punctuation may hang outside the end edge of the last line.</dd>
-      <dt><dfn title="hanging-punctuation:start"><code>end-edge</code></dfn></dt>
-        <dd>Punctuation may hang outside the end edge of all lines.</dd>
+      <dt><dfn title="hanging-punctuation:first"><code>first</code></dfn></dt>
+        <dd>Punctuation (specifically, opening brackets and quotes) may hang
+          outside the start edge of the first line.</dd>
+      <dt><dfn title="hanging-punctuation:last"><code>last</code></dfn></dt>
+        <dd>Punctuation (specifcally, closing brackets and quotes) may hang
+          outside the end edge of the last line.</dd>
+      <dt><dfn title="hanging-punctuation:allow-end"><code>allow-end</code></dfn></dt>
+        <dd>Punctuation (specifically, stops and commas) may hang outside the
+          end edge of all lines if the punctuation does not otherwise fit
+          prior to justification.</dd>
+      <dt><dfn title="hanging-punctuation:force-end"><code>force-end</code></dfn></dt>
+        <dd>Punctuation (specifically, stops and commas) may hang outside the
+          end edge of all lines. If justification is enabled on this line, then
+          it will force the punctuation to hang.</dd>
     </dl>
 
+    <p>In all cases only one punctuation character may hang outside the edge
+      of the line. </p>
+
     <p class="issue">Need to work on the description.
-      Cover indentation as well.
+      Cover indentation as well. Check for Western use-cases.
 
   <h3 id="text-overflow"><a name="text-overflow-props"></a><a name="text-overflow-mode"></a><a name="text-overflow-ellipsis"></a><a name="ellipsis-def"></a>
       <span class="secno">9.3</span>