lass="heading">Signature</h3><dl><dt class="spec type" id="type-t"><a href="#type-t" class="anchor"></a><code><span class="keyword">type</span> t</code><code> = <span><span>(<a href="argument-2-M/index.html#type-t">M.t</a>, <a href="argument-1-T/index.html#type-t">T.t</a>)</span> Stdlib.result</span></code></dt></dl><dl><dt class="spec value" id="val-append"><a href="#val-append" class="anchor"></a><code><span class="keyword">val</span> append : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a h