ruby-ronn 0.7.3-4 (s390x binary) in ubuntu xenial

 Ronn builds manuals. It converts simple, human readable textfiles to roff for
 terminal display, and also to HTML for the web.
 .
 The source format includes all of Markdown but has a more rigid structure and
 syntax extensions for features commonly found in manpages (definition lists,
 link notation, etc.). The ronn-format(7) manual page defines the format in
 detail.