【完善】文档细节。 Signed-off-by: armink <armink.ztl@gmail.com>

Merge pull request #49 from z0306c/async_output_bugfix 修复异步模式下概率性导致输出日志不完整的问题

1、【更新】文档中几处拼写错误。 Signed-off-by: armink <armink.ztl@gmail.com>