1、创建和合并分支、
Git鼓励大量使用分支：
查看分支：git branch
git branch
创建分支：git branch <name>
git branch <name>
切换分支：git checkout <name>
git checkout <name>
创建+切换分支：git checkout -b <name>
git checkout -b <name>
合并某分支到当前分支：git merge <name>
git merge <name>
删除分支：git branch -d <name>
git branch -d <name>