I wrote a minimal, detailed, replicable and markdowned description of the problem in the following link and I report this after days of testing and not "on the fly":
https://serverfault.com/questions/898964/copy-paste-into-digitalocean-modified-ubuntu-bash-includes-dots-instead-tabulati Thanks for your time, Ben, -- *בשאיפה לעולם שמח יותר לבני אדם וחיות כאחד,* *Aspiring for a happier world for humans and animals alike,*