PPrint.ToFormatterThis renderer sends its output into a formatter channel.
type channel = Format.formatterThe type of the output channel.
type document = documentThe type of documents.
pretty rfrac width channel document pretty-prints the document document into the output channel channel. The parameter width is the maximum number of characters per line. The parameter rfrac is the ribbon width, a fraction relative to width. The ribbon width is the maximum number of non-indentation characters per line.