[Bug 2034758] Review Request: apptainer - new name for singularity

https://bugzilla.redhat.com/show_bug.cgi?id=2034758

--- Comment #28 from Maxwell G  ---
Thank you for all your work on this! I have a couple more minor comments.
> %undefine _debugsource_packages

Is this still necessary?
> %{_sysconfdir}/bash_completion.d/*

Bash completions should be installed in
`%{_datadir}/bash-completion/completions`.
> %posttrans
> # clean out empty directories under /etc/singularity
> rmdir %{_sysconfdir}/singularity/* %{_sysconfdir}/singularity 2>/dev/null || true

This looks strange to me. What is it actually needed for?