    # File lib/action_view/helpers/text_helper.rb, line 178
          def auto_link(text, link = :all, href_options = {}, &block)
            return '' if text.blank?
            case link
              when :all             then auto_link_urls(auto_link_email_addresses(text, &block), href_options, &block)
              when :email_addresses then auto_link_email_addresses(text, &block)
              when :urls            then auto_link_urls(text, href_options, &block)
            end
          end