Pacman alias function

pkg.sh

pkg() {
	case "$1" in
		list)
			# List all installed packages
			command pacman -Q
			;;
		list-roots)
			# List all installed packages that aren't required by anything
			command pacman -Qet
			;;
		info)
			# List info about an installed packge
			command pacman -Qi "${@:2}"
			;;
		add)
			command pacman -U "${@:2}"
			;;
		search)
			# Search repo for a package
			command pacman -Ss "${@:2}"
			;;
		install)
			# Install a package from the repo
			command pacman -S "${@:2}"
			;;
		upgrade)
			# System-wide upgrade
			command pacman -Syu
			;;
		delete)
			# Remove a package
			command pacman -R "${@:2}"
			;;
		remove)
			# Remove a package
			command pacman -R "${@:2}"
			;;
		autoremove)
			# Remove all packages which are not required (leaves)
			command pacman -R $(pacman -Qdtq)
			;;
		which)
			# Show which package provides a file
			command pacman -Qo "${@:2}"
			;;
		create)
			command makepkg -s --asroot
			;;
		clean)
			# Remove local copy of the package database
			command pacman -Sc
			;;
		update)
			# Update the package database
			command pacman -Sy
			;;
		forceupdate)
			# Force-update the package database
			command pacman -Syy
			;;
		*)
			echo "Valid arguments are list, list-roots, info, search, add, install, upgrade, delete, remove, autoremove, which, create, clean, update, forceupdate"
	esac		
}

Why the hell does GitHub print tabs as 8 spaces