This reverts commit 464727cc74.
it turns out that without the min_words_per_sentence adjustment, the
default min_words (15) is way too demanding on a lot of chains, so we're
going to go back to this for the moment
this puts additional pressure on the sentence generator, retrying many
times to get something that's long but not too long. only testing on a
small context so far, so this is certainly not yet ready to go live, but
the results are pretty good so far
this tunes things a bit in the sentence generator, trying to favor
complete sentences over the min/max word counts, which are still kinda
heeded but not as militantly. this *should* create more interesting
chains, especially with topics, without really breaking things, but this
certainly needs some testing before we can see if it's actually right
this shouldn't have happened, but i'm guessing some previous crash put
some buggy data into my database, so let's just be careful and do this.
a k1,k2 could have had any value for v, but not knowing what else to do
in this corner case, we'll just use a stop and let the caller decide
if they want to keep going