Thanks for bringing this to our attention. The primary wdiff maintainer (Martin von Gagern) has not been active on the project in some time so I'm not sure how soon the project will get to it.
Denver, Martin (Martin, are you there?) - in principle, all GNU packages should be actively maintained. If you (pl.) no longer have time/inclination to do so, that's perfectly understandable, but please write maintain...@gnu.org to tell them you are stepping down. Then they can at least put up a note that the project is looking for a new maintainer. https://www.gnu.org/prep/maintain/html_node/Stepping-Down.html Since the last wdiff release was in 2014, it seems evident that this is needed. (maintain...@gnu.org should have been contacting you about the long time since the last release, but I guess that hasn't happened.) Thanks, Karl