docs: function definition(node) {
    var content = uri(node.url)
  
    if (node.title) {
      content += space + title(node.title)
    }
  
    return (
      leftSquareBracket +
      (node.label || node.identifier) +
      rightSquareBracket +
      colon +
      space +
      content
    )
  }