="../Core/Cmd/index.html#type-t">Cmd.t</a></span></span></code></div><div class="spec-doc"><p>redirect stderr to an named file for appending. Similar to <code>2&gt;&gt;</code> in the shell.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-devnull_out"><a href="#val-devnull_out" class="anchor"></a><code><span><span class="keyword">val</span> devnull_out : 
  <span><span><span>(<span class="type-var">'stdin</span>, <a href="#type-stdout">stdout</a>, <span class="type-var">'stderr