This file is indexed.

/usr/lib/erlang/releases/RELEASES is in erlang-base 1:18.3-dfsg-1ubuntu3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[{release,"Erlang/OTP","18","7.3",
          [{kernel,"4.2","/usr/lib/erlang/lib/kernel-4.2"},
           {stdlib,"2.8","/usr/lib/erlang/lib/stdlib-2.8"},
           {sasl,"2.7","/usr/lib/erlang/lib/sasl-2.7"}],
          permanent}].