/usr/share/vim/vim80/macros/justify.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 | " Load the justify package.
" For those users who were loading the justify plugin from here.
packadd justify
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