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@@ -356,7 +356,7 @@ list <code>[{&lt;&lt;"key"&gt;&gt;, true}]</code>, using <code>true</code> to in
parameter <code>key</code> was defined, but with no value.</p></div>
<div class="paragraph"><p>The second function Cowboy provides allows you to match out
only the parameters you are interested in, and at the same
-time do any post processing you require using <sup>constraints</sup>.
+time do any post processing you require using <a href="../constraints">constraints</a>.
This function returns a map.</p></div>
<div class="listingblock">
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