code: function(start, finish, desc){
          var range = start + '..' + finish;
          this.assert(
              this.obj >= start && this.obj <= finish
              , function(){ return 'expected ' + this.inspect + ' to be within ' + range + (desc ? " | " + desc : "") }
              , function(){ return 'expected ' + this.inspect + ' to not be within ' + range + (desc ? " | " + desc : "") });
          return this;
      }
docs: Assert within start to finish (inclusive).
  
  @param {Number} start
  @param {Number} finish
  @param {String} description
  @api public