Typo in comment

Author: david-christiansen

message-index/templates/example.html

@@ -5,7 +5,7 @@
   <div class="example">
     <div class="example-inner">
       <div class="example-title">Before</div>
-      <!-- keep next line as is, i.e., on one line, or the code will not format propertly -->
+      <!-- keep next line as is, i.e., on one line, or the code will not format properly -->
       <pre class="example-pre"><code class="language-haskell">$before$</code></pre>
     </div>
   </div>
@@ -17,4 +17,4 @@
     </div>
   </div>
 </div>
-$endfor$
+$endfor$