code: func getPandocContent(ctx *RenderingContext) []byte {
  	path, err := exec.LookPath("pandoc")
  	if err != nil {
  		jww.ERROR.Println("pandoc not found in $PATH: Please install.\n",
  			"                 Leaving pandoc content unrendered.")
  		return ctx.Content
  	}
  	args := []string{"--mathjax"}
  	return externallyRenderContent(ctx, path, args)
  }
docs: // getPandocContent calls pandoc as an external helper to convert pandoc markdown to HTML.