Reference:

• https://pygments.org/docs/cmdline/
• https://linux.die.net/man/1/xclip

sudo apt install -y xclip xsel python-pygments

pygmentize -O style=colorful,linenos=1 -f rtf | xsel -i -b

pygmentize -O style=colorful,linenos=1 -f rtf ../go-commoner/maps/each.go | xclip -i -selection clipboard