event.metaKey. Clean up longdesc:

* Put text in paragraph 
(all text in longdesc must be in a child node)
* Remove MDN link as it didn't provide any more info
* Clarified some language
* Further fixes #144

Author: kswedberg

entries/event.metaKey.xml

@@ -4,9 +4,10 @@
   <signature>
     <added>1.0.4</added>
   </signature>
-	<desc>Indicates whether the META key was pressed when the event fired. </desc>
-	<longdesc>Returns a boolean value that indicates whether or not the META key was pressed at the time the event fired. 
-		This value varies by system, see <a href="https://developer.mozilla.org/en-US/docs/DOM/event.metaKey">https://developer.mozilla.org/en-US/docs/DOM/event.metaKey</a> for more information.
+	<desc>Indicates whether the META key was pressed when the event fired.</desc>
+	<longdesc>
+    <p>Returns a boolean value (<code>true</code> or <code>false</code>) that indicates whether or not the <kbd>META</kbd> key was pressed at the time the event fired.
+    This key might map to an alternative key name on some platforms.</p>
 	</longdesc>
   <example>
     <desc>Determine whether the META key was pressed when the event fired.</desc>
@@ -18,7 +19,7 @@
 		<code><![CDATA[
 $('#checkMetaKey').click(function(e){
   $('#display').text(e.metaKey);
-}); 
+});
 ]]></code>
   </example>
   <category slug="events/event-object"/>