https://bugzilla.redhat.com/show_bug.cgi?id=842568
--- Comment #5 from Markus xously@gmail.com --- I no longer see any bad spacing using my posted fonts.conf with or without the configuration changes posted by Tagoh. Why that is, I really don't know as I can't think of any relevant changes I have consciously made since.
I, again, used LibreOffice which I restarted after changing fonts.conf to create two new screenshots.