/usr/share/doc/ is in ruby-rmagick 2.13.1-5build1.
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/usr/share/doc/ruby-rmagick/
/usr/share/doc/ruby-rmagick/README.html
/usr/share/doc/ruby-rmagick/copyright
/usr/share/doc/ruby-rmagick/examples/
/usr/share/doc/ruby-rmagick/examples/constitute.rb
/usr/share/doc/ruby-rmagick/examples/crop_with_gravity.rb
/usr/share/doc/ruby-rmagick/examples/demo.rb
/usr/share/doc/ruby-rmagick/examples/describe.rb
/usr/share/doc/ruby-rmagick/examples/find_similar_region.rb
/usr/share/doc/ruby-rmagick/examples/histogram.rb
/usr/share/doc/ruby-rmagick/examples/identify.rb
/usr/share/doc/ruby-rmagick/examples/image_opacity.rb
/usr/share/doc/ruby-rmagick/examples/import_export.rb
/usr/share/doc/ruby-rmagick/examples/pattern_fill.rb
/usr/share/doc/ruby-rmagick/examples/rotating_text.rb
/usr/share/doc/ruby-rmagick/examples/spinner.rb
/usr/share/doc/ruby-rmagick/examples/thumbnail.rb
/usr/share/doc/ruby-rmagick/examples/vignette.rb
/usr/share/doc/ruby-rmagick/changelog.Debian.gz