mnussbaum  filed a orphan request for ruby-htmlentities :
The latest version of the upstream package was released in 2015 and the package is still not updated. I've asked the maintainer to update and not heard back.
 https://aur.archlinux.org/account/mnussbaum/  https://aur.archlinux.org/pkgbase/ruby-htmlentities/
Request #14017 has been accepted automatically by the Arch User Repository package request system:
The package base has been flagged out-of-date since 2018-05-25.