vimrc読書会 http://vim-jp.org/reading-vimrc/
~/.vim/あ
@username
3 | let s:is_mac = has('mac') || system('uname') =~? '^darwin'
system()
vimrc#L19
19 | NeoBundle 'L9'
vimrc#L9
9 | set nocompatible " Be iMproved