uadruple stripe</h4>
<p>Used for the <i>qwid</i> feature.
<figure>
<img src="img/stripe_quad.svg" width="300">
<figcaption>quadruple stripe. reference glyph on left, qwid glyph on right.</figure>
</figure>
</section>

<p class="note">There might be cases where a character inside TCY does not have all features, the font need to have characters that only have (or miss) hwid/twid/qwid feature. Tests need to check combination of characters with different feature sets.

<p class="issue">Since the processing deta