- bi-bodyprocedure
A message body, folded to a list of line strings, one per line, with the CRLFs between them dropped, not stored. A run of two or more consecutive CRLFs -- a blank line in the body -- collapses to a single one on print, the same way internet-message.scm's own body grammar collapses it on parse, rather than printing back as an empty line of its own.