Update 404 page

Author: annegentle

404.md

@@ -7,7 +7,8 @@ search_omit: true
 permalink: /404.html
 ---  
 
-Sorry, but the page you were trying to find does not exist --- perhaps you can try searching for it below.
+Sorry, but the page you were trying to find does not exist. 
+Try searching for it below.
 
 <script type="text/javascript">
   var GOOG_FIXURL_LANG = 'en';