/usr/share/nvim/runtime/syntax/xxd.vim is in neovim-runtime 0.2.2-3.
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 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | " Vim syntax file
" Language: bin using xxd
" Maintainer: Charles E. Campbell <NdrOchipS@PcampbellAfamily.Mbiz>
" Last Change: Aug 31, 2016
" Version: 10
" Notes: use :help xxd to see how to invoke it
" URL: http://www.drchip.org/astronaut/vim/index.html#SYNTAX_XXD
" quit when a syntax file was already loaded
if exists("b:current_syntax")
finish
endif
syn match xxdAddress "^[0-9a-f]\+:" contains=xxdSep
syn match xxdSep contained ":"
syn match xxdAscii " .\{,16\}\r\=$"hs=s+2 contains=xxdDot
syn match xxdDot contained "[.\r]"
" Define the default highlighting.
if !exists("skip_xxd_syntax_inits")
hi def link xxdAddress Constant
hi def link xxdSep Identifier
hi def link xxdAscii Statement
endif
let b:current_syntax = "xxd"
" vim: ts=4
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