title: remove field name from object validation message
body: <p>I've got a simple active record validation on an object using this within a form:</p>
  
  <pre><code>  form.error_messages({:message =&gt; '', :header_message =&gt; ''})
  </code></pre>
  
  <p>This in turn outputs something like "FieldName My Custom message"</p>
  
  <p>What i need to do is remove the field name from the error message but leave my custom message.</p>
  
  <p>Can anyone point me in the right direction for this.</p>