/usr/share/vim/vim80/syntax/godoc.vim is in vim-runtime 2:8.0.1453-1ubuntu1.
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 | " Vim syntax file
" Language: Godoc (generated documentation for go)
" Maintainer: David Barnett (https://github.com/google/vim-ft-go)
" Last Change: 2014 Aug 16
if exists('b:current_syntax')
finish
endif
syn case match
syn match godocTitle "^\([A-Z][A-Z ]*\)$"
hi def link godocTitle Title
let b:current_syntax = 'godoc'
" vim: sw=2 sts=2 et
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