.html#type-error_desc">error_desc</a> <span>&#45;&gt;</span> <a href="index.html#type-error_desc">error_desc</a> <span>&#45;&gt;</span> bool</code></dt><dd><p>equality for error_desc</p></dd></dl><dl><dt class="spec value" id="val-pp_error_desc"><a href="#val-pp_error_desc" class="anchor"></a><code><span class="keyword">val</span> pp_error_desc : Stdlib.Format.formatter <span>&#45;&gt;</span> <a href="index.html#type-error_desc">error_desc</a> <span>&#45;&gt;</span> unit</code></dt><dd><p>pretty print an er