this should get plain list. One tag per each line. Eg.:
dist-5E-sw-1.3-candidate
dist-f13-sw-1.3-candidate
if run --list-tags --debug, it should list all tags with explanation
why it is included or not listed. E.g:
dist-5E-sw-1.3-candidate
dist-f13-sw-1.3-candidate whitelisted
dist-f14-sw-1.3-candidate blacklisted