Include optional dependencies of a specific package and colorize the output

Package dependency tree viewer for pacman.
More information: <https://man.archlinux.org/man/pactree.8>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

pactree --optional --color {{package}}

click the source code to copy install pactree on any operating system with command-not-found.com