Description error in tidb-internal-2

[niezefeng]

As follows:
至此我们已经聊完了如何将 Table 映射到 KV 上面，这里再举个简单的例子，便于大家理解，还是以上面的表结构为例。假设表中有 3 行数据：
1."TiDB", "SQL Layer", 10
2."TiKV", "KV Engine", 20
3."PD", "Manager", 30

It should be a comma not a dot after 1/2/3

[siyu-hu]

@shenli PTAL

[shenli]

Yes, @niezefeng Could you send us a PR?