s)</dt>
    
      <dd>Adjust the index forward by <code>count</code> lines, retaining the same character position within the line. If there are fewer than <code>count</code> lines after the line containing the current index, then set the index to refer to the same character position on the last line of the text. Then, if the line is not long enough to contain a character at the indicated character position, adjust the character position to refer to the last character of the line (the newline).</dd>
    
  