This is in vim mode. vimrc, it seems that the comments are aligned.
After watching github, vimrc was a mess.
The same is true for opening with sublime, but it is normal again after Sublime sets tab size =2.
Because your file is indented with tab instead of space, just replace it:
sed -i '' -E "s/$(echo -n -e "\t")/ /g" .vimrc
In addition, vim can be configured to indent with space instead of tab:
set expandtab set tabstop=2 set shiftwidth=2 set softtabstop=2