mismatch between example and first footnote in #unique-items

advanced-iterators.html

@@ -142,7 +142,7 @@ if __name__ == '__main__':
 <a><samp class=p>>>> </samp><kbd class=pp>set(''.join(words))</kbd>              <span class=u>&#x2463;</span></a>
 <samp class=pp>{'E', 'D', 'M', 'O', 'N', 'S', 'R', 'Y'}</samp></pre>
 <ol>
-<li>Given a list of several strings, the <code>set()</code> function will return a set of unique strings from the list. This makes sense if you think of it like a <code>for</code> loop. Take the first item from the list, put it in the set. Second. Third. Fourth&nbsp;&mdash;&nbsp;wait, that&#8217;s in the set already, so it only gets listed once, because Python sets don&#8217;t allow duplicates. Fifth. Sixth&nbsp;&mdash;&nbsp;again, a duplicate, so it only gets listed once. The end result? All the unique items in the original list, without any duplicates. The original list doesn&#8217;t even need to be sorted first.
+<li>Given a list of several strings, the <code>set()</code> function will return a set of unique strings from the list. This makes sense if you think of it like a <code>for</code> loop. Take the first item from the list, put it in the set. Second. Third. Fourth. Fifth&nbsp;&mdash;&nbsp;wait, that&#8217;s in the set already, so it only gets listed once, because Python sets don&#8217;t allow duplicates. Sixth. Seventh&nbsp;&mdash;&nbsp;again, a duplicate, so it only gets listed once. The end result? All the unique items in the original list, without any duplicates. The original list doesn&#8217;t even need to be sorted first.
 <li>The same technique works with strings, since a string is just a sequence of characters.
 <li>Given a list of strings, <code>''.join(<var>a_list</var>)</code> concatenates all the strings together into one.
 <li>So, given a list of strings, this line of code returns all the unique characters across all the strings, with no duplicates.