truncate (ActionView::Helpers::TextHelper)

    # File lib/action_view/helpers/text_helper.rb, line 70
          def truncate(text, *args)
            options = args.extract_options!
            unless args.empty?
              ActiveSupport::Deprecation.warn('truncate takes an option hash instead of separate ' +
                'length and omission arguments', caller)

              options[:length] = args[0] || 30
              options[:omission] = args[1] || "..."
            end
            options.reverse_merge!(:length => 30, :omission => "...")

            if text
              l = options[:length] - options[:omission].mb_chars.length
              chars = text.mb_chars
              (chars.length > options[:length] ? chars[0...l] + options[:omission] : text).to_s
            end
          end