Database in 1.6.0

[eluser]BlueCamel[/eluser]
I'm reading the 1.6.0 docs for escaping database values:
http://ellislab.com/codeigniter/user-gui...eries.html

For $this->db->escape_str($data) and $this->db->escape($data), the docs say that it adds single quotes around the data so you don't have to.

For mysql on 1.6.0 with php 5.2.3, this doesn't appear to be the case. Is this a doc bug or a code bug?