Use coverage report highlighting also for code snippets in documentation.
diff --git a/org.jacoco.doc/docroot/doc/implementation.html b/org.jacoco.doc/docroot/doc/implementation.html
index ec1be8c..1867501 100644
--- a/org.jacoco.doc/docroot/doc/implementation.html
+++ b/org.jacoco.doc/docroot/doc/implementation.html
@@ -4,9 +4,11 @@
 <head>

   <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />

   <link rel="stylesheet" href=".resources/doc.css" charset="ISO-8859-1" type="text/css" />

+  <link rel="stylesheet" href="../coverage/.resources/prettify.css" charset="ISO-8859-1" type="text/css" />

+  <script type="text/javascript" src="../coverage/.resources/prettify.js"></script>

   <title>JaCoCo - Implementation Design</title>

 </head>

-<body>

+<body onload="prettyPrint()">

 

 <div class="breadcrumb">

   <a href="../index.html" class="el_session">JaCoCo</a> &gt;

@@ -234,7 +236,7 @@
 </p>

 

 

-<pre class="source">

+<pre class="source lang-java">

 <span class="nr">    1</span>Object access = ...                          // Retrieve instance

 <span class="nr">    2</span>

 <span class="nr">    3</span>Object[] args = new Object[3];