Fix typo in the "Porting to Python 3.8" section. (GH-16435)

miss-islington · bariod · web-flow · commit 294c5229b12c · 2019-10-11T14:09:44.000-07:00
(cherry picked from commit dd6117c) Co-authored-by: bariod <35639254+bariod@users.noreply.github.com>
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst
@@ -1531,7 +1531,7 @@ Changes in Python behavior
   :class:`int`, :class:`float`, :class:`complex` and few classes from
   the standard library.  They now inherit ``__str__()`` from :class:`object`.
   As result, defining the ``__repr__()`` method in the subclass of these
-  classes will affect they string representation.
+  classes will affect their string representation.
   (Contributed by Serhiy Storchaka in :issue:`36793`.)
 
 * On AIX, :attr:`sys.platform` doesn't contain the major version anymore.
