ng <code>Incr</code> to the
  previous element, until <code>To</code> is reached or passed (in the latter
  case, <code>To</code> is not an element of the sequence).</td></tr>
<tr><td valign="top"><a href="#sort-1">sort/1</a></td><td>
  Returns an iterator containing the sorted elements of <code>Iterator1</code>.</td></tr>
<tr><td valign="top"><a href="#sort-2">sort/2</a></td><td>
  Returns an iterator containing the sorted elements of <code>Iterator1</code>,
  according to the ordering function <code>Fun</