/usr/share/puppet/modules.available/puppetlabs-rsync/Gemfile is in puppet-module-puppetlabs-rsync 0.2.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | source "https://rubygems.org"
gem 'puppetlabs_spec_helper'
gem 'puppet'
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