/code> that immediately follows a backslash
   character; it then stands for a plain <code class="code">$</code>.
   Raise <code class="code"><span class="constructor">Not_found</span></code> if the closing character of a parenthesized variable
   cannot be found.</li>
</ul>
</div>
</div>

<pre><span id="VALadd_buffer"><span class="keyword">val</span> add_buffer</span> : <code class="type"><a href="Buffer.html#TYPEt">t</a> -&gt; <a href="Buffer.html#TYPEt">t</a> -&gt; unit</code></pre><div class="info ">
<d