I’ve received several comments on my earlier post where I confessed that I didn’t know until recently about the “rule” to place only one space after a punctuation mark. I am going to address this issue in more detail when I review comprehensively the 10 best takeaways from Matthew Butterick’s Typography for Lawyers. But for some to suggest that everyone should know and apply this spacing rule appear to ignore history, as this writer explains in Why two spaces after a period isn’t wrong (or, the lies typographers tell about history). His conclusion: “Yeah, typography is an art. Complaining about the way people space their sentences in their own documents is being an a**.”