[css-conditional] Make the 'box-shadow' example make more sense, since I was thinking more of 'text-shadow' when I wrote it.

Fixes http://lists.w3.org/Archives/Public/www-style/2013Mar/0037.html

Author: dbaron

css-conditional/Overview.html

@@ -806,20 +806,26 @@ <h2 id=at-supports><span class=secno>6. </span>Feature queries: the
     class=property>box-shadow</code>’ property, including checking for
     support for vendor-prefixed versions of it. When the support is present,
     it specifies both ‘<code class=property>box-shadow</code>’ (with the
-    prefixed versions) and ‘<code class=property>color</code>’ in a way
-    what would cause the text to become invisible were ‘<code
+    prefixed versions) and ‘<code class=property>border</code>’ in a way
+    what would cause the box to become invisible were ‘<code
     class=property>box-shadow</code>’ not supported.
 
-   <pre>@supports ( box-shadow: 2px 2px 2px black ) or
-          ( -moz-box-shadow: 2px 2px 2px black ) or
-          ( -webkit-box-shadow: 2px 2px 2px black ) or
-          ( -o-box-shadow: 2px 2px 2px black ) {
+   <pre>.outline {
+  border: 1px solid black;
+  padding: 1px;
+}
+@supports ( box-shadow: 0 0 2px black inset ) or
+          ( -moz-box-shadow: 0 0 2px black inset ) or
+          ( -webkit-box-shadow: 0 0 2px black inset ) or
+          ( -o-box-shadow: 0 0 2px black inset ) {
   .outline {
-    color: white;
-    -moz-box-shadow: 2px 2px 2px black;
-    -webkit-box-shadow: 2px 2px 2px black;
-    -o-box-shadow: 2px 2px 2px black;
-    box-shadow: 2px 2px 2px black; /* unprefixed last */
+    -moz-box-shadow: 0 0 2px black inset;
+    -webkit-box-shadow: 0 0 2px black inset;
+    -o-box-shadow: 0 0 2px black inset;
+    box-shadow: 0 0 2px black inset; /* unprefixed last */
+    /* override the rule above the @supports rule */
+    border: none;
+    padding: 2px;
   }
 }</pre>
   </div>
@@ -1552,12 +1558,13 @@ <h2 class=no-num id=acknowledgments>Acknowledgments</h2>
 
   <p> Thanks to the ideas and feedback from Tab Atkins, Arthur Barstow, Ben
    Callahan, <span lang=tr>Tantek Çelik</span>, Alex Danilo, Elika Etemad,
-   Pascal Germroth, <span lang=de>Björn Höhrmann</span>, Paul Irish, <span
-   lang=nl>Anne van Kesteren</span>, Vitor Menezes, Alex Mogilevsky, Chris
-   Moschini, James Nurthen, Simon Pieters, <span lang=fr>Florian
-   Rivoal</span>, <span lang=fr>Simon Sapin</span>, Nicholas Shanks, Ben
-   Ward, Zack Weinberg, Estelle Weyl, Boris Zbarsky, and all the rest of the
-   <a href="http://lists.w3.org/Archives/Public/www-style/">www-style</a>
+   Pascal Germroth, <span lang=de>Björn Höhrmann</span>, Paul Irish, Brad
+   Kemper, <span lang=nl>Anne van Kesteren</span>, Vitor Menezes, Alex
+   Mogilevsky, Chris Moschini, James Nurthen, Simon Pieters, <span
+   lang=fr>Florian Rivoal</span>, <span lang=fr>Simon Sapin</span>, Nicholas
+   Shanks, Ben Ward, Zack Weinberg, Estelle Weyl, Boris Zbarsky, and all the
+   rest of the <a
+   href="http://lists.w3.org/Archives/Public/www-style/">www-style</a>
    community.
 
   <h2 class=no-num id=references>References</h2>

css-conditional/Overview.src.html

@@ -550,18 +550,24 @@ <h2 id="at-supports">Feature queries: the '@supports' rule</h2>
 <p>The following example checks for support for the 'box-shadow'
 property, including checking for support for vendor-prefixed versions of
 it.  When the support is present, it specifies both 'box-shadow' (with
-the prefixed versions) and 'color' in a way what would cause the text to
+the prefixed versions) and 'border' in a way what would cause the box to
 become invisible were 'box-shadow' not supported.</p>
-<pre>@supports ( box-shadow: 2px 2px 2px black ) or
-          ( -moz-box-shadow: 2px 2px 2px black ) or
-          ( -webkit-box-shadow: 2px 2px 2px black ) or
-          ( -o-box-shadow: 2px 2px 2px black ) {
+<pre>.outline {
+  border: 1px solid black;
+  padding: 1px;
+}
+@supports ( box-shadow: 0 0 2px black inset ) or
+          ( -moz-box-shadow: 0 0 2px black inset ) or
+          ( -webkit-box-shadow: 0 0 2px black inset ) or
+          ( -o-box-shadow: 0 0 2px black inset ) {
   .outline {
-    color: white;
-    -moz-box-shadow: 2px 2px 2px black;
-    -webkit-box-shadow: 2px 2px 2px black;
-    -o-box-shadow: 2px 2px 2px black;
-    box-shadow: 2px 2px 2px black; /* unprefixed last */
+    -moz-box-shadow: 0 0 2px black inset;
+    -webkit-box-shadow: 0 0 2px black inset;
+    -o-box-shadow: 0 0 2px black inset;
+    box-shadow: 0 0 2px black inset; /* unprefixed last */
+    /* override the rule above the @supports rule */
+    border: none;
+    padding: 2px;
   }
 }</pre></div>
 
@@ -1257,6 +1263,7 @@ <h2 class=no-num id="acknowledgments">Acknowledgments</h2>
 Pascal Germroth,
 <span lang="de">Björn Höhrmann</span>,
 Paul Irish,
+Brad Kemper,
 <span lang="nl">Anne van Kesteren</span>,
 Vitor Menezes,
 Alex Mogilevsky,