Updated documentation since the example was not relevant any more

extending.html

@@ -45,8 +45,8 @@ <h1>Language definitions</h1>
 		<dt>lookbehind</dt>
 		<dd>This option mitigates JavaScript’s lack of lookbehind. When set to <code>true</code>, 
 		the first capturing group in the regex <code>pattern</code> is discarded when matching this token, so it effectively behaves 
-		as if it was lookbehind. For an example of this, check out the JavaScript language definition, in particular the regex and comment tokens:
-		<pre data-src="components/prism-javascript.js"></pre></dd>
+		as if it was lookbehind. For an example of this, check out the C-like language definition, in particular the comment and class-name tokens:
+		<pre data-src="components/prism-clike.js"></pre></dd>
 
 		<dt>rest</dt>
 		<dd>Accepts an object literal with tokens and appends them to the end of the current object literal. Useful for referring to tokens defined elsewhere. For an example where <code>rest</code> is useful, check the Markup definitions above.</dd>
@@ -203,4 +203,4 @@ <h2>Returns</h2>
 <script src="code.js"></script>
 
 </body>
-</html>
+</html>