Q. Although CMOS 6.9 states clearly that commas and periods should always go within quotation marks, it doesn’t provide a solution when you have to put the single and double quotation marks together, as in “He announced, ‘These quotation marks look terrible.’” Is there a prescribed amount of space that goes between the single and double quotes in these cases?

A. Please see CMOS 6.11: “When single quotation marks nested within double quotation marks appear next to each other, no space need be added between the two except as a typographical nicety subject to the publisher’s requirements.” (You can find this by typing “single quotation marks” into the Search box or by looking in the index under “Quotation marks: single: double next to.”)