/usr/ is in ruby-fast-stemmer 1.0.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
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/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
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/usr/lib/ruby/vendor_ruby/1.9.1/x86_64-linux/
/usr/lib/ruby/vendor_ruby/1.9.1/x86_64-linux/stemmer.so
/usr/lib/ruby/vendor_ruby/fast_stemmer.rb
/usr/lib/ruby/vendor_ruby/fast-stemmer.rb
/usr/share/lintian/overrides/ruby-fast-stemmer
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/fast-stemmer-1.0.2.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/fast-stemmer-1.0.2.gemspec
/usr/share/doc/
/usr/share/doc/ruby-fast-stemmer/
/usr/share/doc/ruby-fast-stemmer/README
/usr/share/doc/ruby-fast-stemmer/copyright
/usr/share/doc/ruby-fast-stemmer/changelog.Debian.gz