s="info ">
<div class="info-desc">
<p><code class="code">rcontains_from&nbsp;s&nbsp;stop&nbsp;c</code> tests if byte <code class="code">c</code> appears in <code class="code">s</code> before
    position <code class="code">stop+1</code>.</p>

<p>Raise <code class="code"><span class="constructor">Invalid_argument</span></code> if <code class="code">stop&nbsp;&lt;&nbsp;0</code> or <code class="code">stop+1</code> is not a valid
    position in <code class="code">s</code>.</p>
</div>
</div>

<pre><span id="VAL