original_string: private function MatchChar($tok){
  		if( ($this->pos < $this->input_len) && ($this->input[$this->pos] === $tok) ){
  			$this->skipWhitespace(1);
  			return $tok;
  		}
  	}
code: private function MatchChar($tok){
  		if( ($this->pos < $this->input_len) && ($this->input[$this->pos] === $tok) ){
  			$this->skipWhitespace(1);
  			return $tok;
  		}
  	}
code_tokens: private function MatchChar ( $ tok ) { if ( ( $ this -> pos < $ this -> input_len ) && ( $ this -> input [ $ this -> pos ] === $ tok ) ) { $ this -> skipWhitespace ( 1 ) ; return $ tok ; } }
docstring: Match a single character in the input,
docstring_tokens: Match a single character in the input