zendframework/zf2-documentation — pull request #935 by joshribakoff (2013-07-03 13:13:26+00:00)
Title: Zend\Validator\Alnum does not exist

Your documentation is wrong. This class doesn't exist, even looking back at the earliest tags in ZF2. Why did it go in to the docs wrong in the first place? Very frustrating as a user.