The section on colons does not reference that two spaces should follow a colon. In fact, it acquiesces to the erroneous software defaults. I understand that Bill Gates has eliminated this punctuation rule because he cares more about saving bits-n-bytes space than the English language (remember the days when he eliminated two spaces at the end if sentences, but later recinded that god-complex decision in later releases if M.S. Word?). I realize that the the current, vehement, trend toward compliance (these recent decades that obey spell-check logic without protest) is to reduce the spaces after colons to one if the preceding word is not capitalized, but even some of these embracers of mediocrity still expect two spaces if a capitalized word follows. Whether you agree or disagree, it would serve to reference your understanding of the colon-spacing rules.