/usr/ is in ruby-blankslate 2.1.2.4-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.8/
/usr/share/rubygems-integration/1.8/specifications/
/usr/share/rubygems-integration/1.8/specifications/blankslate-2.1.2.4.gemspec
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/blankslate-2.1.2.4.gemspec
/usr/share/doc/
/usr/share/doc/ruby-blankslate/
/usr/share/doc/ruby-blankslate/changelog.Debian.gz
/usr/share/doc/ruby-blankslate/copyright
/usr/lib/
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/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/blankslate.rb