>> +of digits to four or less.

dM> s/less/fewer/, please.  English has not yet lost the distinction
dM> between a mass noun and a count noun, though to see the number of
dM> people (mis)using "less" (instead of "fewer") with count nouns, you
dM> could be forgiven for thinking so.

Thanks for pointing this out, I just used the (incorrect) expression
from the FreeBSD manpage without second thought. :)

-Tomas