The web archive ("internet wayback machine") has it. http://web.archive.org/web/20180729211816/http://doc.sagemath.org:80/html/en/reference/notebook/sagenb/notebook/interact.html
Hopefully Harald can adjust how he builds the documentation for doc.sagemath.org and have it include the sagenb documentation. Samuel -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.