* table.el (with no spanning)

+--------+--------+--------+--------+--------+--------+
|label   |a       |b       |c       |d       |e       |
+--------+--------+--------+--------+--------+--------+
|1       |a1      |b1      |c1      |d1      |e1      |
+--------+--------+--------+--------+--------+--------+
|2       |a2      |b2      |c2      |d2      |e2      |
+--------+--------+--------+--------+--------+--------+
|3       |a3      |b3      |c3      |d3      |e3      |
+--------+--------+--------+--------+--------+--------+
|4       |a4      |b4      |c4      |d4      |e4      |
+--------+--------+--------+--------+--------+--------+
|5       |a5      |b5      |c5      |d5      |e5      |
+--------+--------+--------+--------+--------+--------+

* table.el (with spanning)

+--------+--------+--------+--------+--------+-----------+
|label   |a       |b       |c       |d       |e          |
+--------+--------+--------+--------+--------+-----------+
|1       |a1      |b1      |c1      |d1      |e1 e2 e3 e4|
+--------+--------+--------+--------+--------+           |
|2       |a2 b2 c2                  |d2      |           |
+--------+--------+-----------------+--------+           |
|3       |a3      |b3 c3 d3                  |           |
+--------+--------+--------+--------+--------+           |
|4       |a4      |b4      |c4      |d4      |           |
+--------+--------+--------+--------+--------+-----------+
|5       |a5      |b5      |c5      |d5      |e5         |
+--------+--------+--------+--------+--------+-----------+