 <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'acc</span>)</span> <span class="arrow">&#45;&gt;</span></span> <span>string <span class="arrow">&#45;&gt;</span></span> <span><span class="label">init</span>:<span class="type-var">'acc</span> <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'acc</span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-trim"><a href="#val-trim" class="anchor"></a><code><span><span class="keyword">val