One Space or Two?

Q. I saw someone sharing a post recently stating that you now support two spaces after a period, falling in line with AP style. Is this correct?

A. Don’t believe everything you read. Neither Chicago nor AP nor any other style that we know of—including APA, as of the seventh edition of its style manual, published in late 2019—recommends more than one space after a period. See our post on this subject and its long history at CMOS Shop Talk.

[This answer relies on the 17th edition of CMOS (2017) unless otherwise noted.]