The makefile contains the actual commands for the demo, which are nothing simpler than one of these:$ copyright-injection.pl . check$ copyright-injection.pl . add$ copyright-injection.pl . remove$ copyright-injection.pl --helpDEMO$ make remove # deletes copyright notices from all pl and pm files under lib/ and script/$ make grep # verify that copyright notices have been removed$ make add # add copyright notices back again$ make grep # verify they have been added