Hi Igor, I forgot to write the version I'm using. It's on Ubuntu 16.04, git-gui package version 1:2.7.4-0ubuntu1 (--version: git-gui version 0.20.0), git version 2.7.4, tcl and tk 8.6.0+9. Perhaps it got fixed in a newer version, in that case, my bad for not checking before posting.
Thanks, Juraj
