/usr/share/doc/puppet-module-puppetlabs-apt/examples/release.pp is in puppet-module-puppetlabs-apt 4.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | apt::conf { 'release':
content => 'APT::Default-Release "karmic";',
priority => '01',
}
|