instance method assets_gemfile_entry

# File railties/lib/rails/generators/app_base.rb, line 195
      def assets_gemfile_entry
        return if options[:skip_sprockets]

        gemfile = if options.dev? || options.edge?
          <<-GEMFILE
            # Gems used only for assets and not required
            # in production environments by default.
            group :assets do
              gem 'sass-rails',   :git => 'git://github.com/rails/sass-rails.git', :branch => '3-2-stable'
              gem 'coffee-rails', :git => 'git://github.com/rails/coffee-rails.git', :branch => '3-2-stable'

              # See https://github.com/sstephenson/execjs#readme for more supported runtimes
              #{javascript_runtime_gemfile_entry}
              gem 'uglifier', '>= 1.0.3'
            end
          GEMFILE
        else
          <<-GEMFILE
            # Gems used only for assets and not required
            # in production environments by default.
            group :assets do
              gem 'sass-rails',   '~> 3.2.3'
              gem 'coffee-rails', '~> 3.2.1'

              # See https://github.com/sstephenson/execjs#readme for more supported runtimes
              #{javascript_runtime_gemfile_entry}
              gem 'uglifier', '>= 1.0.3'
            end
          GEMFILE
        end

        gemfile.strip_heredoc.gsub(/^[ \t]*$/, '')
      end