e (the newline).</dd>
    
      <dt>(base linestart)</dt>
    
      <dd>Adjust the index to refer to the first character on the line.</dd>
    
      <dt>(base lineend)</dt>
    
      <dd>Adjust the index to refer to the last character on the line (the newline).</dd>
    
      <dt>(base wordstart)</dt>
    
      <dd>Adjust the index to refer to the first character of the word containing the current index. A word consists of any number of adjacent characters that are letters, digits, or underscores, or 