/usr/share/doc/ruby-amqp/examples/tls_certificates/testca/cacert.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 | -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
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