necessary. If there are fewer than <code>count</code> characters in the text after the current index, then set the index to the last character in the text.</dd>
    
      <dt>(base - count chars)</dt>
    
      <dd>Adjust the index backward by <code>count</code> characters, moving to earlier lines in the text if necessary. If there are fewer than <code>count</code> characters in the text before the current index, then set the index to the first character in the text.</dd>
    
      <dt>(base + count line