Good catch! Yes, the chapter has been adapted (see directory listing immediately above this line for example), but that line was missed. I’ll make sure that it it corrected in the next beta.
Just curious on timing of the next beta of the PDF?
Later this week. I’m reverifying everything with Rails 2.1, and once that is complete I want to make it available. The changes aren’t that extensive, but even so, I want to keep the beta in sync with the latest release available of Rails.