Sets of gets property end value (basically, it's a semicolon)
@param {String} val New end value. If not passed, current
value is returned
function(val) {
			if (!_.isUndefined(val) && this._end !== val) {
				this.parent._updateSource(val, this._positions.end, this._positions.end + this._end.length);
				this._end = val;
			}
			
			return this._end;
		}