+[submodule "rt-liberation"]
+ path = lib/rt-liberation
+ url = https://git.savannah.gnu.org/git/rtliber.git
+ info-path = doc
+ # rt-liberation creates doc/{dir,rt-liberation.info} files, which
+ # make git think that the submodule is dirty. so, let's ignore
+ # the untracked files of rt-liberation's submodule
+ ignore = untracked