code: function image(node) {
    var self = this
    var content = uri(self.encode(node.url || '', node))
    var exit = self.enterLink()
    var alt = self.encode(self.escape(node.alt || '', node))
  
    exit()
  
    if (node.title) {
      content += space + title(self.encode(node.title, node))
    }
  
    return (
      exclamationMark +
      leftSquareBracket +
      alt +
      rightSquareBracket +
      leftParenthesis +
      content +
      rightParenthesis
    )
  }
docs: Stringify an image.  Is smart about enclosing `url` (see `encloseURI()`) and `title` (see `encloseTitle()`).  ```markdown ![foo](</fav icon.png> 'My "favourite" icon') ```  Supports named entities in `url`, `alt`, and `title` when in `settings.encode` mode.