ZF-8961 modificaions to chapter for Zend_Filter_Dir per documentation spec. Documentation test is passing.

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@22249 44c647ce-9c0f-0410-b52a-842ac1e357ba

documentation/manual/en/module_specs/Zend_Filter-Dir.xml

@@ -4,9 +4,25 @@
     <title>Dir</title>
 
     <para>
-         Given a string containing a path to a file, this function will return the name of the directory. 
+        Given a string containing a path to a file, this function will return the
+        name of the directory.
     </para>
 
+     <sect3 id="zend.filter.set.dir.options">
+        <title>Supported options for Zend_Filter_Dir</title>
+
+        <para>
+            There are no additional options for <classname>Zend_Filter_Dir</classname>.
+        </para>
+    </sect3>
+
+     <sect3 id="zend.filter.set.dir.basic">
+        <title>Basic usage</title>
+
+        <para>
+            A basic example of usage is below:
+        </para>
+
     <programlisting language="php"><![CDATA[
 $filter = new Zend_Filter_Dir();
 
@@ -21,4 +37,6 @@ print $filter->filter('c:/Temp/x');
 // returns "c:/Temp"
 ]]></programlisting>
 
+    </sect3>
+
 </sect2>