Clarify some comments making use of leetspeak term "up2date"
Most of these are new, as of
a8fd13c, and "up-to-date" is much easier to
parse for the average reader.
Author: Peter Smith
Discussion: https://postgr.es/m/CAHut+PtHbHvgOjs_R9LyDF21j-Wn8SxoTtWMQNP2ifXN6t2cSg@mail.gmail.com