I think diff is at least 50 years old. It shows up in the unix v5 source from 1974. https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/source/s1/diff1.c htt

I think diff is at least 50 years old. It shows up in the unix v5 source from 1974. https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/source/s1/diff1.c https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/source/...