span class="type-var">'acc</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span>(<span class="type-var">'acc</span>, string)</span> <span class="xref-unresolved">Stdlib</span>.result</span></span></code></div><div class="spec-doc"><p>Same as <a href="#val-fold"><code>fold</code></a>, but joins stdout and stderr into a single stream.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fold_both"><a href="#val-fold_both" class="anchor"></a><code><span><span class="keywor