t;</span></span>
  <span class="type-var">'acc</span></span></code></div><div class="spec-doc"><p>Same as <a href="#val-fold"><code>fold</code></a>, but fold over lines from stderr.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fold_joined"><a href="#val-fold_joined" class="anchor"></a><code><span><span class="keyword">val</span> fold_joined : 
  <span><span><span>(<span class="type-var">'stdin</span>, <a href="Core/index.html#type-stdout">Core.stdout</a>, <a href="Core/inde