/usr/share/vim/vim74/keymap/persian.vim is in vim-runtime 2:7.4.052-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | let encoding = &enc
if encoding == ''
let encoding = 'utf-8'
endif
if encoding == 'utf-8'
source <sfile>:p:h/persian-iranian_utf-8.vim
endif
|