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

I’m guilty. I admit it, and swear to change my rotten ways. What misguided typing teacher taught me this habit? Had the shift from typewriters to computers in my public school been that recent? Think of all the time and paper I’ve wasted! It’s tempting to edit out the extra spaces in all my past posts, but talk about a waste of time. I’m going running.