git config --global core.whitespace cr-at-eol
cr-at-eol treats a carriage-return at the end of line as part of the line terminator, i.e. with it, trailing-space does not
trigger if the character before such a carriage-return is not a whitespace (not enabled by default).
去掉git提交时出现很多^M提示符，
git config --global core.filemode false
git 提交时忽略文件权限，该值默认是true
git config --global core.autocrlf false Git可以在你提交时自动地把行结束符CRLF转换成LF，而在签出代码时把LF转换成CRLF。用core.autocrlf来打开此项功能，如果是在Windows系统上，把它设置成true，这样当签出代码时，LF会被转换成CRLF。如果是在linux下开发，则关掉此功能。
