# File lib/heroku/commands/config.rb, line 44
      def display_vars(vars, options={})
        max_length = vars.map { |v| v[0].to_s.size }.max
        vars.keys.sort.each do |key|
          if options[:shell]
            display "#{key}=#{vars[key]}"
          else
            spaces = ' ' * (max_length - key.to_s.size)
            display "#{' ' * (options[:indent] || 0)}#{key}#{spaces} => #{format(vars[key], options)}"
          end
        end
      end