Thanks for pointing this out. I had the notion that the years pertain to LEIM as a whole, not particular files. I'll submit a patch.

sob., 16 mar 2019 o 01:49 Glenn Morris <rgm@gnu.org> napisał(a):

Unless you have been developing sami.el for 21 years, I think just
"2019" is the right copyright year, not a list going back to 1998.