/usr/share/emacs/site-lisp/elpa-src/go-autocomplete-20170907/go-autocomplete-pkg.el is in elpa-go-autocomplete 20170907-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | ;;; -*- no-byte-compile: t -*-
(define-package "go-autocomplete" "20170907" "auto-complete-mode backend for go-mode" 'nil)
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