/usr/share/vim/addons/ftplugin/llvm-3.8.vim is in llvm-3.8-dev 1:3.8-2ubuntu1.
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 9 10 11 12 | " Vim filetype plugin file
" Language: LLVM Assembly
" Maintainer: The LLVM team, http://llvm.org/
if exists("b:did_ftplugin")
finish
endif
let b:did_ftplugin = 1
setlocal softtabstop=2 shiftwidth=2
setlocal expandtab
setlocal comments+=:;
|