code: func Render(doc []byte) []byte {
  	renderer := NewRoffRenderer()
  
  	return blackfriday.Run(doc,
  		[]blackfriday.Option{blackfriday.WithRenderer(renderer),
  			blackfriday.WithExtensions(renderer.GetExtensions())}...)
  }
docs: // Render converts a markdown document into a roff formatted document.