highlight (ActionView::Helpers::TextHelper)

    # File lib/action_view/helpers/text_helper.rb, line 109
          def highlight(text, phrases, *args)
            options = args.extract_options!
            unless args.empty?
              options[:highlighter] = args[0] || '<strong class="highlight">\1</strong>'
            end
            options.reverse_merge!(:highlighter => '<strong class="highlight">\1</strong>')

            if text.blank? || phrases.blank?
              text
            else
              match = Array(phrases).map { |p| Regexp.escape(p) }.join('|')
              text.gsub(/(#{match})/i, options[:highlighter])
            end
          end