Changelog for gr-display-3.7.3-5.2.x86_64.rpm :

* Wed Sep 29 2021 wkAATTire.pw.edu.pl- separate specfile for GR-3.7 version (SLE12 only)- cleanup of spec files
* Sun Feb 16 2020 wkAATTire.pw.edu.pl- fixed build on Leap 15.2
* Fri Dec 13 2019 wkAATTire.pw.edu.pl- initial specfile- snapshot git20190817 for GNU Radio 3.8 (Tumbleweed)- version 3.7.3 for GNU Radio 3.7