Two spaces after a period: Why you should never, ever do it. – Slate Magazine.

The author makes a very good point that two spaces after a period is unnecessary in a proportional font world. Very useful in a in a mono-spaced world. I also thought the author spent too much time disparaging the double spacers of the world (probably needed to fill in all the space he had left).

One point for continuing the double space method is to make it easier to parse e-text by computer. Although with computing getting much more capable of figuring out what people intend, this may be a moot point.

And, of course, this does not apply to writers that are using the spaces on a page to complete their work.

I was trying to find a link, using E E Cummings as an example. I found l(a as a candidate and then went on to find at least three different versions on the web, laid out differently and spelled differently. And I don’t have a printed copy in hand to determine which version is closest to the author’s vision. But if you go to Collected Poems 1922-1938  you will see that a number of his poems depend on the actual layout of the letters and the empty spaces,  as well as the content of the words.