[DOCUMENTATION] wrong number of functions

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@18032 44c647ce-9c0f-0410-b52a-842ac1e357ba

documentation/manual/en/module_specs/Zend_Validate-WritingValidators.xml

@@ -11,7 +11,7 @@
     </para>
 
     <para>
-        <classname>Zend_Validate_Interface</classname> defines three methods,
+        <classname>Zend_Validate_Interface</classname> defines two methods,
         <methodname>isValid()</methodname> and <methodname>getMessages()</methodname>, that may
         be implemented by user classes in order to create custom validation objects. An object that
         implements <classname>Zend_Validate_Interface</classname> interface may be added to a