/usr/share/ is in ruby-rdiscount 1.6.8-3build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/ruby-rdiscount/
/usr/share/doc/ruby-rdiscount/README.markdown
/usr/share/doc/ruby-rdiscount/copyright
/usr/share/doc/ruby-rdiscount/changelog.Debian.gz
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/rdiscount.1.gz
/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/rdiscount-1.6.8.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/rdiscount-1.6.8.gemspec