                <p>
                      <code class="computeroutput"><span class="identifier">repeat</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      Repeat the generator <code class="computeroutput"><span class="identifier">a</span></code>
                      zero or more times. This generator succeeds as long as its
                      embedded