auto_id example contains an error

[fabbe@…]

The auto_id example says:

  For example, for a format string 'field_%s', a field named subject will get the id value 'field_subject'.

But the example code says:

>>> f = ContactForm(auto_id='id_for_%s')
>>> print f.as_table()
<tr><th><label for="id_for_subject">Subject:</label></th><td><input id="id_for_subject" type="text" name="subject" maxlength="100" /></td></tr>
...

That should be ... for="field_subject" ...

[Chris Beaven]

It says "for example", not "in the following example".

The code clearly starts with the auto_id string set to 'id_for_%s' so I don't see the error.