/usr/share/doc/ray/Documentation/ is in ray-doc 2.3.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/ray/Documentation/454.txt
/usr/share/doc/ray/Documentation/AMAZON_EC2.txt
/usr/share/doc/ray/Documentation/BiologicalAbundances.txt
/usr/share/doc/ray/Documentation/Blue_Gene_Q.txt
/usr/share/doc/ray/Documentation/COMPILERS.txt
/usr/share/doc/ray/Documentation/ChangeLog.gz
/usr/share/doc/ray/Documentation/CodingStyle.txt
/usr/share/doc/ray/Documentation/Distributed-Storage-Engine.txt
/usr/share/doc/ray/Documentation/Features.txt
/usr/share/doc/ray/Documentation/GeneOntology.txt
/usr/share/doc/ray/Documentation/Illumina.txt
/usr/share/doc/ray/Documentation/InstructionManual.tex.gz
/usr/share/doc/ray/Documentation/IonTorrent.txt
/usr/share/doc/ray/Documentation/Migration-to-the-Actor-Model.txt
/usr/share/doc/ray/Documentation/NCBI-Taxonomy.txt
/usr/share/doc/ray/Documentation/PAIRED_READS
/usr/share/doc/ray/Documentation/PacBio.txt
/usr/share/doc/ray/Documentation/Profiling.txt
/usr/share/doc/ray/Documentation/README-heuristics
/usr/share/doc/ray/Documentation/RELEASE_PROCEDURE.txt
/usr/share/doc/ray/Documentation/Ray-Surveyor.md
/usr/share/doc/ray/Documentation/Ray-in-the-Cloud.txt
/usr/share/doc/ray/Documentation/Releases.txt
/usr/share/doc/ray/Documentation/Routing.txt
/usr/share/doc/ray/Documentation/SOLiD.txt
/usr/share/doc/ray/Documentation/ScaffoldingAlgorithm.txt
/usr/share/doc/ray/Documentation/Submit-a-patch.txt
/usr/share/doc/ray/Documentation/Taxonomy.txt
/usr/share/doc/ray/Documentation/VISUAL_STUDIO.txt
/usr/share/doc/ray/Documentation/Very-Large-Jobs.txt
/usr/share/doc/ray/Documentation/format-COLOR_SPACE
/usr/share/doc/ray/Documentation/index.markdown
/usr/share/doc/ray/Documentation/l-mers.txt
/usr/share/doc/ray/Documentation/scaffolder-cases.txt