[css-text-decor] Fix computed value line for text-shadow.

Author: tabatkins

css-text-decor/Overview.bs

@@ -1063,35 +1063,15 @@ Emphasis Mark Position: the 'text-emphasis-position' property</h3>
 <h2 id="text-shadow-property">
 Text Shadows: the 'text-shadow' property</h2>
 
-  <table class="propdef">
-    <tr>
-      <th>Name:
-      <td><dfn>text-shadow</dfn>
-    <tr>
-      <th><a href="#values">Value</a>:
-      <td>none | [ &lt;length>{2,3} && &lt;color>? ]#
-    <tr>
-      <th>Initial:
-      <td>none
-    <tr>
-      <th>Applies to:
-      <td>all elements
-    <tr>
-      <th>Inherited:
-      <td>yes
-    <tr>
-      <th>Percentages:
-      <td>N/A
-    <tr>
-      <th>Media:
-      <td>visual
-    <tr>
-      <th>Computed&#160;value:
-      <td>a color plus three absolute &lt;length&gt;s
-    <tr>
-      <th>Animatable:
-      <td>as <a href="http://www.w3.org/TR/css3-transitions/#animtype-shadow-list">shadow list</a>
-  </table>
+  <pre class="propdef">
+  Name: text-shadow
+  Value: none | [ <<length>>{2,3} && <<color>>? ]#
+  Initial: none
+  Applies to: all elements
+  Inherited: yes
+  Computed Value:  any <<length>> made absolute; any specified color computed; otherwise as specified
+  Animatable: as <a href="http://www.w3.org/TR/css3-transitions/#animtype-shadow-list">shadow list</a>
+  </pre>
 
   <p>This property accepts a comma-separated list of shadow effects to
     be applied to the text of the element. Values are interpreted as for