anchor.diff:  
   group :development, :test do
     gem 'factory_girl_rails'
  -  gem 'rspec-rails', '>= 2.14'
  +  gem 'rspec-rails', '>= 3.1'
   end
   
   group :staging, :production do
  -  gem 'newrelic_rpm', '>= 3.6.7'
  +  gem 'newrelic_rpm', '>= 3.9.6'
   end
   
   group :test do
  -  gem 'poltergeist', '>= 1.4.0'
  +  gem 'poltergeist', '>= 1.5.0'
     gem 'database_cleaner'
     gem 'simplecov', require: false
   end
  
positive.code: <% if options[:bootstrap] -%>
  gem 'bootstrap-sass'
  <% end -%>
  gem 'coffee-rails', '~> 4.0.0'
  <% if options[:devise] -%>
  gem 'devise'
  <% end -%>
  
negative.code: gem 'flutie'
  gem 'jquery-rails'
  gem 'pg'
  gem 'rails', '~> 4.1.6'
  gem 'sass-rails', '~> 4.0.4'
  gem 'simple_form'
  gem 'slim-rails'
  gem 'uglifier', '>= 2.5.0'
  
  group :development do
    gem 'better_errors'
  