/usr/share/lintian/overrides/ruby-hyperestraier-doc is in ruby-hyperestraier-doc 1.4.13-12ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | ruby-hyperestraier-doc binary: duplicate-files usr/share/doc/ruby-hyperestraier-doc/rubynativeapi/rdoc-style.css usr/share/doc/ruby-hyperestraier-doc/rubypureapi/rdoc-style.css
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