[fw-general] Zend_Form documentation issue

[Sergei Izvorean]

While learning about Zend_Form I used examples from quick start guide.
However, when I tested my code I've got an error "Cannot unset string
offsets" in Zend_Form_Element.
I found how to fix the issue
(http://www.nabble.com/Problems-submitting-a-Zend_Form-td20109449.html).
Yet, in the documentation examples Regex validator occurs with and
without a wrapper array. For example:

// Pass a pattern
$username->addValidator('regex', false, array('/^[a-z]/i'));

further down:
// or, more compactly:
$username->addValidators(array('alnum',
        array('regex', false, '/^[a-z]/i')
    ))

Doc. page: 
http://framework.zend.com/manual/en/zend.form.quickstart.html#zend.form.quickstart.elements

Thanks.