It seems that you have installed GNU texinfo which will override debian install-info.
You could run "install-info --version" to see which install-info you're using now.
It should be like:
Debian install-info version 1.14.20ubuntu1.
Copyright (C) 1994,1995 Ian Jackson.
This is free software; see the GNU General Public Licence version 2 or
later for copying conditions. There is NO warranty.
It seems that you have installed GNU texinfo which will override debian install-info.
You could run "install-info --version" to see which install-info you're using now.
It should be like:
Debian install-info version 1.14.20ubuntu1.
Copyright (C) 1994,1995 Ian Jackson.
This is free software; see the GNU General Public Licence version 2 or
later for copying conditions. There is NO warranty.