typo "an bytes object" --> "a bytes object "

strings.html

@@ -338,7 +338,7 @@ <h2 id=byte-arrays>Strings vs. Bytes</h2>
 <samp class=p>>>> </samp><kbd class=pp>barr</kbd>
 <samp class=pp>bytearray(b'fbcde')</samp></pre>
 <ol>
-<li>To convert an <code>bytes</code> object into a mutable <code>bytearray</code> object, use the built-in <code>bytearray()</code> function.
+<li>To convert a <code>bytes</code> object into a mutable <code>bytearray</code> object, use the built-in <code>bytearray()</code> function.
 <li>All the methods and operations you can do on a <code>bytes</code> object, you can do on a <code>bytearray</code> object too.
 <li>The one difference is that, with the <code>bytearray</code> object, you can assign individual bytes using index notation. The assigned value must be an integer between 0&ndash;255.
 </ol>