当我关闭缓冲区时，有没有办法维持或至少更好地扩展分割？

1) Vim window with three splits,custom size:
  +---+-------+---+
  |   |       |   |
  | 1 |   2   | 3 |
  |   |       |   |
  +---+-------+---+
2) Close buffer 3,splits are resized to "best fit":
  +-------+-------+
  |       |       |
  |   1   |   2   |
  |       |       |
  +-------+-------+
3) I want it to stay like this,resize only adjacent buffer:
  +---+-----------+
  |   |           |
  | 1 |     2     |
  |   |           |
  +---+-----------+