/usr/share/doc/ruby-amqp/examples/tls_certificates/testca/certs/02.pem is in ruby-amqp 0.9.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
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