ag has no effect with the output facet <code class="computeroutput"><span class="identifier">nonfinite_num_put</span></code>.
      </p>
<p>
        If the legacy flag is used with the <code class="computeroutput"><span class="identifier">nonfinite_num_get</span></code>
        input facet, then the facet will recognize all the following string representations
        of <code class="computeroutput"><span class="identifier">infinity</span></code> and <code class="computeroutput"><span class="identifier">NaN