Install ruby-rmagick-doc by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-rmagick-doc
Description:
ImageMagick API for Ruby (documentation)
RMagick is an interface between the Ruby programming language and the ImageMagick image processing library. . This package contains the documentation and some example scripts.
Homepage: https://github.com/rmagick/rmagick
Version: 2.16.0-4
Section: universe/doc