pe</a>
      </h6>
<p>
        The escape sequence <code class="computeroutput"><span class="special">\</span><span class="identifier">Q</span></code>
        begins a "quoted sequence": all the subsequent characters are treated
        as literals, until either the end of the regular expression or <code class="computeroutput"><span class="special">\</span><span class="identifier">E</span></code> is found.
        For example the expression: <code class="computeroutput"><span class="special">\</span><span c