On Mon, Jan 27, 2014, Tadziu Hoffmann wrote:
> If I may hazard a guess, it is possible that the notion of
> *doubling* the space did indeed come from typewriters, where
> spaces came in one size only.
This is almost certainly the case. And one does wish that writers
of text destined to be read at
> Back in the day of standalone phototypesetters, eg. the mighty
> Linotronic or CompuGraphic's 8400, everything was line-at-a-time yet
> the results were almost always better than what can be achieved with
> groff. The reason was that both word- and letter-spacing (track
> kerning) were used to
