/usr/share/doc/prover9-doc/examples/group-terms.out is in prover9-doc 0.0.200902a-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | e.
x = x.
% rewriter group.demods: rewrote 2 terms with 13 rewrite steps in 0.01 seconds.
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