    # File lib/ramaze/snippets/string/esc.rb, line 17
          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