New comment by hervyqa on void-packages repository

https://github.com/void-linux/void-packages/pull/32301#issuecomment-896073369

Comment:
> > If @noarchwastaken is interested in this continuing the work on pdfarranger, I will to close this PR as a duplicate of #30338, but @hervyqa, please create a review on that PR, because some parts of this one are better and should be moved there.
> > If they are not interested in it anymore, we can continue here and pull in some of their changes.
> > @rivanfebrian123 thanks for noticing this
> 
> I'll go with this PR since it has the above fixes.
> 
> About the `xvfb-run` dependency, I can't find any checks included with `pdfarranger`, so what does `setup.py test` actually do here?

Needs a graphical session. https://github.com/void-linux/void-packages/pull/32301#issuecomment-891248272

```
running build_ext
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
/builddir/pdfarranger-1.7.1/pdfarranger/splitter.py:17: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk

(setup.py:3814): Gtk-CRITICAL **: 18:11:15.810: gtk_clipboard_get_for_display: assertion 'display != NULL' failed

(setup.py:3814): Gtk-CRITICAL **: 18:11:15.810: gtk_clipboard_get_for_display: assertion 'display != NULL' failed
Unable to init server: Could not connect: Connection refused

(setup.py:3814): Gtk-WARNING **: 18:11:15.811: cannot open display: 
=> ERROR: pdfarranger-1.7.1_1: do_check: 'python3 setup.py ${make_check_target} ${make_check_args}' exited with 1
=> ERROR:   in do_check() at common/build-style/python3-module.sh:40
Error: Process completed with exit code 1.
```