Small javadoc fix.

Author: carlosame

src/overview.html

@@ -8,7 +8,7 @@
 <code>DOMDocumentFactory</code>, and the produced documents (and elements) will
 be style-aware.</p>
 <p>To use the library with dom4j (using dom4j-like documents, elements and factory) you need the <code>css4j-dom4j</code> module in addition to the core
-module. Although the -dom4j module formally depends on the -agent module, you do not really need it unless you plan to use the DOM4J agent.</p>
+module. The -dom4j module optionally depends on the -agent module, you do not need it unless you plan to use the DOM4J agent.</p>
 <div style="margin: 2em 0 2.7em 0">
 <h3>Example with DOM4J</h3>
 <p>This is the easiest way to use this package with DOM4J, using that library's <code>SAXReader</code>:</p>