我换了中国科大的源，源的文件没有错
yum.repos.d里有两个。
[root@localhost ~]# yum install yum-fastestmirror -y
Config Error: File contains no section headers.
file: file://///etc/yum.repos.d/CentOS-Base.repo, line: 3
' # This file uses a new mirrorlist system developed by Lance Davis for CentOS.\n'
这是为什么？？
