diff --git a/pdf/index_for_pdf.html b/pdf/index_for_pdf.html
index 29f9d05..b9cc8f8 100644
--- a/pdf/index_for_pdf.html
+++ b/pdf/index_for_pdf.html
@@ -37,7 +37,7 @@
 <strong>curses module, <a href="#curses">34</a></strong><br>
 <strong>cython, <a href="#cython">49</a></strong>  </p>
 <h3 id="d">D</h3>
-<p><strong>dataclasses module, <a href="#namedtupleenumdataclass">12</a></strong>, <a href="#dataclass">15</a></strong><br>
+<p><strong>dataclasses module, <a href="#namedtupleenumdataclass">12</a>, <a href="#dataclass">15</a></strong><br>
 <strong>datetime module, <a href="#datetime">8</a>-<a href="#constructors">9</a></strong><br>
 <strong>decorator, <a href="#decorator">13</a></strong><br>
 <strong>deques, <a href="#deque">29</a></strong><br>