git 提交

1. git status  查看修改的文件
1. 首先add: `git add file`  提交需要修改的文件
2. 删除`master`分支: `git commit -m '' `
3. 拉取分支: `git pull origin dev_lhh`
4. diff: `git diff dev_lhh origin/dev_lhh`
5. push: `git push origin dev_lhh`