Correct typo

I think that this was actually a result of a spell checker being a bit
too eager.

_posts/2024-10-14-functor-sums.html

@@ -204,7 +204,7 @@ <h3 id="9cf974abd1fb497aa43087e7697bb982">
         What remains is only to tell <code>Aggregate</code> what to do when the tree is empty, and how to transform the 'naked' node <code>value</code>. The <code>Select</code> implementation handles the former by returning a new empty tree, and the latter by invoking <code><span style="font-weight:bold;color:#1f377f;">selector</span>(<span style="font-weight:bold;color:#1f377f;">value</span>)</code>.
     </p>
     <p>
-        Not only does the binary tree form a functor, but it turns out that the <a href="/2024/08/19/zippers">Zapper</a> does as well, because the breadcrumbs also give rise to a functor.
+        Not only does the binary tree form a functor, but it turns out that the <a href="/2024/08/19/zippers">Zipper</a> does as well, because the breadcrumbs also give rise to a functor.
     </p>
     <h3 id="02e7e55d7f6f4c0d94c50cf577238859">
         Breadcrumbs <a href="#02e7e55d7f6f4c0d94c50cf577238859">#</a>