When reading a novel, select a random passage which hasn't been shown
already. Once you've run through all the passages, it resets to get
them all again (with new random order that might happen to the be same
order if there aren't many passages). Switching to a different novel--
even another copy of the same one--will cause the previous passage
selection to be discarded and restarted from scratch if the prior book
is read again. Passage tracking for the most recently read novel is
kept across save and restore. (That means I needed to bump EDITLEVEL,
so it will need to be reset to 0 again before release.)
projects / nethack / commit