Translate the second section of chapter 2.

Translate 02-git-basics/sections/recording-changes.asc
1. 将前半句的逗号改为分号
2. the left hand column indicates that the file is staged and the right hand column indicates that it's modified 一句翻译有误，left 是 is staged，译文是“没放入暂存区”；请根据原文重新翻译。