I am confused by how auto-fill deals with periods near the end of the
line. It seems that the determination of where to wrap is based not
only on spaces, but also on periods. That is, auto-fill seems to
search for the final space before the last column, but if that space
is preceded by a period, it looks back for the preceding space, and
so
on. I notice this
I think you're seeing another feature of the system:
sentence-end-double-space. It's usd among other things to prevent
wrapping the line right after "e.g." or "Mr." and things like that.
Stefan