Oxford comma

README.md

@@ -1255,7 +1255,7 @@ class MySequence:
 
 ### Collections.abc.Sequence
 * **It's a richer interface than the basic sequence.**
-* **Extending it generates iter(), contains(), reversed(), index(), and count().**
+* **Extending it generates iter(), contains(), reversed(), index() and count().**
 * **Unlike `'abc.Iterable'` and `'abc.Collection'`, it is not a duck type. That is why `'issubclass(MySequence, abc.Sequence)'` would return False even if MySequence had all the methods defined.**
 ```python
 from collections import abc

index.html

@@ -1192,7 +1192,7 @@ Hello World!
 
 <div><h3 id="collectionsabcsequence">Collections.abc.Sequence</h3><ul>
 <li><strong>It's a richer interface than the basic sequence.</strong></li>
-<li><strong>Extending it generates iter(), contains(), reversed(), index(), and count().</strong></li>
+<li><strong>Extending it generates iter(), contains(), reversed(), index() and count().</strong></li>
 <li><strong>Unlike <code class="python hljs"><span class="hljs-string">'abc.Iterable'</span></code> and <code class="python hljs"><span class="hljs-string">'abc.Collection'</span></code>, it is not a duck type. That is why <code class="python hljs"><span class="hljs-string">'issubclass(MySequence, abc.Sequence)'</span></code> would return False even if MySequence had all the methods defined.</strong></li>
 </ul><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> collections <span class="hljs-keyword">import</span> abc