Eliminate widows/orphans

[ShawnJGoff]

Currently, if a message is just the wrong length, a single word may be carried to a new line. This is called an orphan or widow. See http://en.wikipedia.org/wiki/Widows_and_orphans for more details. It makes it easy to miss that last word. The solution would be to detect if this occurs and replace the last space with a non-breaking space.