Type professionals can get amusingly—if justifiably—overworked about spaces. "Forget about tolerating differences of opinion: typographically speaking, typing two spaces before the start of a new sentence is absolutely, unequivocally wrong," Ilene Strizver, who runs a typographic consulting firm The Type Studio, once wrote. "When I see two spaces I shake my head and I go, Aye yay yay," she told me. "I talk about 'type crimes' often, and in terms of what you can do wrong, this one deserves life imprisonment. It's a pure sign of amateur typography." "A space signals a pause," says David Jury, the author of About Face: Reviving The Rules of Typography. "If you get a really big pause—a big hole—in the middle of a line, the reader pauses. And you don't want people to pause all the time. You want the text to flow."
I mention it because I am a pedant. I can't help it. I have an OCD about ensuring all vowels are present in relevant words (twitter being an exception), that commas are not used excessively and that only one space is used after a full stop. That's right, one. I'm not perfect, I admit, but I try my damned best to be.