code: function fixempty(str, limit) {
      var i,
          n = limit - str.length;
      if (n < 0) {
          n = 0;
      }
      return str + function () {
          var _i,
              _results = [];
          for (i = _i = 0; 0 <= n ? _i <= n : _i >= n; i = 0 <= n ? ++_i : --_i) {
              _results.push(" ");
          }
          return _results;
      }().join('');
  }
docs: 对其空格文字