nbsp;range&nbsp;]</code> to delimit the end of the token. A scanning
    indication is introduced by a <code class="code">@</code> character, followed by some
    plain character <code class="code">c</code>. It means that the string token should end
    just before the next matching <code class="code">c</code> (which is skipped). If no <code class="code">c</code>
    character is encountered, the string token spreads as much as
    possible. For instance, <code class="code"><span class="string">"%s@\t"</spa