On Nov 29, 2019, at 23:18, John C Klensin <john-ietf@xxxxxxx> wrote: > > identified a weakness in rfcdiff The RFC 7386/7396 accident was also caused by this (root cause was apparently the use of HT characters, which need to be expunged from the universe, but rfcdiff helped in not detecting the problem before publication). Grüße, Carsten