Maybe they looked into it and found it wasn’t super relevant nor interesting, but while reading the paper I found myself wondering about the “edit distances” in those typos.

Ex: ‘e’ is dot, ‘t’ is dash; making a /t/e/ substitution seem very plausible, and my hypothesis is that including that extra layer of info would be interesting. I didn’t go through all the others, and would also be willing to believe it’s a dead end.