Short of a <pre> block or a PDF, how do you put double spaces after a sentence on the web? In browsers, that's reduced to a single space automatically.
would work too, but stops the line from breaking after sentences.
Not that its a good idea... But that's how you'd do it :)
More seriously - is anything like that used in the wild? I'm just trying to figure out why they gave a suggestion to stop doing something that it takes such improbable work-arounds to do in the first place. Double-spacing after sentences sticks out like a sore thumb in proportional fonts.