whatsnew: argparse FileType accepts errors and encodings args.
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index 5b68243..19d71cc 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -495,6 +495,14 @@
 plain tuple.  (Contributed by Claudiu Popa in :issue:`17818`.)
 
 
+argparse
+--------
+
+The :class:`~argparse.FileType` class now accepts *encoding* and
+*errors* arguments, which are passed through to :func:`open`.  (Contributed
+by Lucas Maystre in :issue:`11175`.)
+
+
 audioop
 -------