git is a distributed version control system.
git is a free software distributed under the GPL.
Git has a mutable index called stage.
Git tracks changes of files.
远程提交合金测试第三次.
create a new branch1.it's very simple.
测试合并模式不使用fast forward。
还需要三天才能提交,现在可以提交了.
a在这里加了一行。
b在这里加了一行。