- fmt-columns <column> ...procedure
The low-level formatter on which columnar is based. Each <column> must be a list of 2-3 elements:
(<line-formatter> <line-generator> [<infinite?>])
where <line-generator> is the column generator as above, and the <line-formatter> is how each line is formatted. Raw concatenation of each line is performed, without any spacing or width adjustment. <infinite?>, if true, indicates this generator produces an infinite number of lines and termination should be determined without it.