original_string: public function increment($num = 1)
      {
          $this->_progress = min(max(0, $this->_progress + $num), $this->_total);
  
          return $this;
      }
code: public function increment($num = 1)
      {
          $this->_progress = min(max(0, $this->_progress + $num), $this->_total);
  
          return $this;
      }
code_tokens: public function increment ( $ num = 1 ) { $ this -> _progress = min ( max ( 0 , $ this -> _progress + $ num ) , $ this -> _total ) ; return $ this ; }
docstring: Increment the progress bar.
  
  @param int $num The amount of progress to advance by.
  @return $this
docstring_tokens: Increment the progress bar .