anchor.diff:    String toString() => 'WHITESPACE';
     bool call(int value) => (9 <= value && value <= 13) || (value == 32)
         || (value == 160) || (value == 5760) || (value == 6158)
  -      || (8192 <= value && value <= 8202) || (value == 8232) || (value == 8233)
  -      || (value == 8239) || (value == 8287) || (value == 12288);
  +      || (8192 <= value && value <= 8202) || (value == 8232)
  +      || (value == 8233) || (value == 8239) || (value == 8287)
  +      || (value == 12288);
   }
   
   /** Internal method to convert an element to a character code. */
  
positive.code:   CharMatcher operator | (CharMatcher other) => other;
  }
  
  /** Matches a specifc character. */
  CharMatcher isChar(char) {
    return new _SingleCharMatcher(_toCharCode(char));
  }
  
negative.code:   bool call(int value) => _value == value;
  }
  
  /** Matches a character range from [start] to [stop]. */
  CharMatcher inRange(start, stop) {
    return new _RangeCharMatcher(_toCharCode(start), _toCharCode(stop));
  }
  