http://www.worldhello.net/2012/03/19/git-quiz.html
试试不去运行命令，直接做
我的答案：
A B A D B B B _ C D A B D A _ _ A _ C D
『 _ 』表示不知选什么：）
可惜没有参考答案看看
Git 1.7.2+
These versions of git heed the .gitattributes directive, so it is not strictly necessary to set autocrlf, but it is recommended.
These versions of git will apply the autocrlf setting to new files - preventing the introduction of non-normalized crlf files into the repository, but ignoring existing crlf files.
