Ends of sentences

[Henry Lieberman <Henry at OZ>]

In Symbolics 3600 Zwei in Release 6.0, IP-TCP 29.0, AISite 8.3,
microcode TMC5-MIC 319, on Lisp Machine Apiary-3:

I would like the sentence commands to understand a sentence terminator "." or "?"
or "!" followed by a SINGLE space as the end of a sentence, as well as when followed
by two spaces. I am in the habit of ending my sentences with just a single space
and this confuses the Zwei sentence commands.