/usr/share/doc/ruby-amqp/examples/tls_certificates/testca/certs/01.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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