###example
Fix typo in introduction to user guide
Refactor subsystem X for readability
Update getting started documentation
Remove deprecated methods
Release version 1.0.0
###The seven rules of a great git commit message:
1.Separate subject from body with a blank line 用空行隔开段落内容
2.Limit the subject line to 50 characters 把段落字数控制在50个字内
3.Capitalize the subject line 行首字母大写
4.Do not end the subject line with a period 不要以句号结尾
5.Use the imperative mood in the subject line 使用祈使句
6.Wrap the body at 72 characters 全部内容控制在72字内
7.Use the body to explain what and why vs. how 利用文字解释修改了什么,为什么改与如何改