code: function(arg1, arg2, argN) {
              var args = Array.prototype.slice.call(arguments);
              var msg = args.join(' ') + "\n";
  
              write(msg);
          }
docs: Write one or more messages either to the grunt log or to the file.
  If the configuration variable <code>build.options.log_file</code>
  defines a path, then that file is used. Otherwise the messages are
  written to the <i>Grunt</i>-log.
  
  @param arg1 {any} First message.
  @param argN {any} Last message.