 the end point of a range, for
        example: <code class="computeroutput"><span class="special">[[.</span><span class="identifier">ae</span><span class="special">.]-</span><span class="identifier">c</span><span class="special">]</span></code>
        matches the character sequence "ae", plus any single character
        in the range "ae"-c, assuming that "ae" is treated as
        a single collating element in the current locale.
      </p>
<p>
        Collating elements may be used in place of escapes (