# File lib/ramaze/snippets/string/esc.rb, line 13
      def escape which = :html
        case which
        when :html
          Rack::Utils.escape_html(self)
        when :cgi
          Rack::Utils.escape(self)
        when :uri
          ::URI.escape(self)
        else
          raise ArgumentError, "do not know how to escape '#{ which }'"
        end
      end