ruby2.5-doc 2.5.5-1ubuntu1 (amd64 binary) in ubuntu eoan

 Ruby is the interpreted scripting language for quick and easy
 object-oriented programming. It has many features to process text
 files and to do system management tasks (as in perl). It is simple,
 straight-forward, and extensible.
 .
 This package contains the autogenerated documentation for Ruby 2.5.