Install devhelp-common by entering the following commands in the terminal:
sudo apt update sudo apt install devhelp-common
Description:
Common files for devhelp and its library
Devhelp's primary goal is to be an API documentation browser for GNOME. It is able to scan for .devhelp files generated automatically for packages that use gtk-doc-tools to generate documentation for libraries and programs. . This package provides internationalization files, mainly.
Homepage: https://wiki.gnome.org/Apps/Devhelp
Version: 3.28.1-1
Section: devel