code: func NewRoffRenderer() *roffRenderer { // nolint: golint
  	var extensions blackfriday.Extensions
  
  	extensions |= blackfriday.NoIntraEmphasis
  	extensions |= blackfriday.Tables
  	extensions |= blackfriday.FencedCode
  	extensions |= blackfriday.SpaceHeadings
  	extensions |= blackfriday.Footnotes
  	extensions |= blackfriday.Titleblock
  	extensions |= blackfriday.DefinitionLists
  	return &roffRenderer{
  		extensions: extensions,
  	}
  }
docs: // NewRoffRenderer creates a new blackfriday Renderer for generating roff documents
  // from markdown