original_string: public function appendNode($new_node)
      {
          $pos = $this->count();
          $new_node->setPosition($pos);
          $this->push($new_node);
      }
code: public function appendNode($new_node)
      {
          $pos = $this->count();
          $new_node->setPosition($pos);
          $this->push($new_node);
      }
code_tokens: public function appendNode ( $ new_node ) { $ pos = $ this -> count ( ) ; $ new_node -> setPosition ( $ pos ) ; $ this -> push ( $ new_node ) ; }
docstring: Adds a node onto the linked list.
  
  @param mixed $new_node New node to add to the list
  
  @return void
docstring_tokens: Adds a node onto the linked list .