de> and <code>f</code> are examples of correct <code>&lt;opt-spec&gt;</code>.</p>
</dd>
<dt class="hdlist1"><code>&lt;flags&gt;</code></dt>
<dd>
<p><code>&lt;flags&gt;</code> are of <code>*</code>, <code>=</code>, <code>?</code> or <code>!</code>.</p>
<div class="ulist">
<ul>
<li>
<p>Use <code>=</code> if the option takes an argument.</p>
</li>
<li>
<p>Use <code>?</code> to mean that the option takes an optional argument. You
probably want to use the <code>--stuck-long</code> mode to be able to
