make text-decoration-skip:all not affect text decorations specified on the same element

Author: fantasai

css3-text/Overview.src.html

@@ -2302,7 +2302,7 @@ <h4 id="text-decoration-skip"><span class="secno">8.1.5</span>
           </tr>
           <tr>
             <th>Value:</th>
-            <td>none | [ images || spaces || ink ] | all
+            <td>none | [ images || spaces || ink || all ]
             </td>
           </tr>
           <tr>
@@ -2356,7 +2356,8 @@ <h4 id="text-decoration-skip"><span class="secno">8.1.5</span>
           otherwise cross over a glyph. The UA may also skip a small
           distance to either side of the glyph outline.</dd>
         <dt><dfn title="text-decoration-skip:all">all</dfn></dt>
-        <dd>Skip over all content in this element.</dd>
+        <dd>Skip over all content in this element. This value does
+          <em>not</em> affect text decorations drawn by this element.</dd>
       </dl>
 
       <p class="issue">Do we need a value that <em>doesn't</em> skip