Highlight external links.
diff --git a/org.jacoco.doc/docroot/doc/environment.html b/org.jacoco.doc/docroot/doc/environment.html
index 6f9da67..4458f70 100644
--- a/org.jacoco.doc/docroot/doc/environment.html
+++ b/org.jacoco.doc/docroot/doc/environment.html
@@ -13,6 +13,7 @@
   <a href="index.html" class="el_group">Documentation</a> &gt;

   <span class="el_source">Development Environment</span>

 </div>

+<div id="content"> 

 

 <h1>Development Environment</h1>

 

@@ -88,6 +89,7 @@
   with the development team.

 </p>

 

+</div>

 <div class="footer">

   <div class="versioninfo"><a href="@HOMEURL@">JaCoCo</a> @VERSION@</div>

   <a href="license.html">Copyright</a> &copy; 2009, 2010 Mountainminds GmbH &amp; Co. KG and Contributors