I added the duplicate definition a while ago because I did not expect to
find it in Darcs.Patch.Permutations. As Darcs.Patch.CommuteFn seems to be a
better location for this, I kept the new version and removed the old one.
1 patch for repository http://darcs.net/screened:
Author: Ben Franksen <email@example.com>
Date: Wed Oct 31 17:07:55 CET 2018
* remove duplicate definition of invertCommuter as inverseCommuter