rails/rails — pull request #9401 by sikachu (2013-02-24 19:17:03+00:00)
Title: Remove `--builder` option from `rails` command

Ability to use a custom builder by passing `--builder` (or `-b`) has been removed. Consider using application template instead. See this guide for more detail: http://guides.rubyonrails.org/rails_application_templates.html