In Chapter 1, when I set the Prawn dependency version in the gemspec to “0.12.0”, as is written in the text, I get the following error when I access http://localhost:3000/home.pdf:
Prawn::Errors::UnknownFont in HomeController#index
Couldn't find the font: Helvetica.afm
This was fixed for me when I changed the Prawn dependency version to “1.0.0.rc2”. Not sure if this is belongs as an errata or if it’s an issue specific to my environment so I’m posting it here in case anyone else has a similar issue.