Install gnu-smalltalk-doc by entering the following commands in the terminal:
sudo apt update sudo apt install gnu-smalltalk-doc
Description:
GNU Smalltalk info documentation
This package contains the documentation in info format for GNU Smalltalk. . For more information on GNU Smalltalk see the gnu-smalltalk package.
Homepage: http://smalltalk.gnu.org
Version: 3.2.5-1.1
Section: universe/doc