Delete seperator line between rows

[yixinglu]

The current style is consistent with relational databases such as mysql, and this is also more convenient for us to generate tck test result

Execution succeeded (time spent 783/1264 us)

Wed, 29 Sep 2021 20:48:07 CST

(root@nebula) [nba]> show tags;
+------------+
| Name       |
+------------+
| "bachelor" |
| "player"   |
| "team"     |
+------------+
Got 3 rows (time spent 577/930 us)

Wed, 29 Sep 2021 20:48:09 CST

(root@nebula) [nba]> go from "Tim Duncan" over like yield like._dst, like._dst
+-----------------+-----------------+
| like._dst       | like._dst       |
+-----------------+-----------------+
| "Manu Ginobili" | "Manu Ginobili" |
| "Tony Parker"   | "Tony Parker"   |
+-----------------+-----------------+
Got 2 rows (time spent 1844/2377 us)

Wed, 29 Sep 2021 20:49:56 CST

[jievince]

Very good.