FULLPRINTP (variable)
if TRUE, then words that were created using backslash or vertical bar
(to include characters that would otherwise not be treated as part of
a word) are printed with the backslashes or vertical bars shown, so
that the printed result could be re-read by Logo to produce the same
value. If FULLPRINTP is TRUE then the empty word (however it was
created) prints as ||. (Otherwise it prints as nothing at all.)