RE: line adjustment at the end of a sentence

[Drew Adams]

> Also there's no good convention for how to distinguish on screen a SPC
> from a NBSP.  Emacs highlights the NBSP specially (because accidental
> use of NBSP in program code leads to trouble) but that's not 
> ideal when reading text that uses NBSP between Dr. and Watson or
> between < and the quoted text.

I agree generally with everything you said.  Wrt showing no-break space and
non-breaking hyphen so that you can distinguish them from SPC and ASCII hyphen,
`show-wspace.el' can help.

There are commands that toggle the distinguishing display of each on/off, and
you can customize the faces used for that.  Quick toggling is helpful, because
most of the time you don't care about the difference, but you can easily check.

http://www.emacswiki.org/emacs-en/show-wspace.el

http://emacswiki.org/emacs/ShowWhiteSpace#ShowWspace