rails_gemfile_entry

# File railties/lib/rails/generators/app_base.rb, line 201
      def rails_gemfile_entry
        if options.dev?
          [GemfileEntry.path('rails', Rails::Generators::RAILS_DEV_PATH),
           GemfileEntry.github('arel', 'rails/arel', '5-0-stable')]
        elsif options.edge?
          [GemfileEntry.github('rails', 'rails/rails', '4-1-stable')]
        else
          [GemfileEntry.version('rails',
                            Rails::VERSION::STRING,
                            "Bundle edge Rails instead: gem 'rails', github: 'rails/rails'")]
        end
      end