pecial
    characters.
    More precisely, <code class="code"><span class="constructor">Scanf</span>.unescaped</code> has the following property:
    for all string <code class="code">s</code>, <code class="code"><span class="constructor">Scanf</span>.unescaped&nbsp;(<span class="constructor">String</span>.escaped&nbsp;s)&nbsp;=&nbsp;s</code>.</p>

<p>Always return a copy of the argument, even if there is no escape sequence
    in the argument.
    Raise <a href="Scanf.html#EXCEPTIONScan_failure"><code clas