span> <span class="special">|</span>          <span class="number">1</span>  <span class="number">1</span>
                        <span class="identifier">M3</span> <span class="special">|</span>          <span class="number">1</span>  <span class="number">1</span>
</pre>
<p>
        </p>
<p>
          For element containers lexicographical equality and sequential element
          equality are identical.
        </p>
<p>
          The <span class="bold"><strong>complexity</strong></span> of sequential ele