  or equal to <code>B</code> in the ordering, otherwise <code>false</code>. When two
  elements compare equal, the element from <code>Iterator1</code> is picked
  before the element from <code>Iterator2</code>.</p>
 
  The first element of each iterator will be evaluated.</p>

<h3 class="function"><a name="merge3-3">merge3/3</a></h3>
<div class="spec">
<p><tt>merge3(Iterator1, Iterator2, Iterator3) -&gt; Iterator4</tt>
<ul class="definitions"><li><tt>Iterator1 = <a href="#type-iterator">iterator</a>(A)</tt>