Make more(1) usable.

Make more(1) usable.

> Yes, I know, "don't use pending". Sadly, more(1) is pretty useless
> without this. It gets confused by long lines or tabs.
>
> This patch also adds the missing prompt between multiple files.

actually, it looks like we're already hard-coding some escape
sequences? more(1) doesn't need anything that isn't in ANSI, so here's
an alternative patch that fixes the same bugs as the other patch but
also has a reverse-video prompt: