If stream, which defaults to *standard-output*, is a pretty-printing stream and *print-pretty* is true, perform tabbing based on kind, otherwise do nothing. The kind can be one of:

:line

Tab to column colnum. If already past colnum then tab to the next multiple of colinc.

:section

Same as :line, but count from the start of the current section, not the start of the line.

:line-relative

Output colnum spaces, then tab to the next multiple of colinc.

:section-relative

Same as :line-relative, but count from the start of the current section, not the start of the line.