Issue #21396: Fix TextIOWrapper(..., write_through=True) to not force a flush() on the underlying binary stream.

Patch by akira.
diff --git a/Misc/ACKS b/Misc/ACKS
index 4068836..75fb706 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -24,6 +24,7 @@
 Farhan Ahmad
 Matthew Ahrens
 Nir Aides
+Akira
 Yaniv Aknin
 Jyrki Alakuijala
 Steve Alexander
diff --git a/Misc/NEWS b/Misc/NEWS
index 96f3cb7..29634fc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -7,6 +7,12 @@
 
 Release date: TBA
 
+Library
+-------
+
+- Issue #21396: Fix TextIOWrapper(..., write_through=True) to not force a
+  flush() on the underlying binary stream.  Patch by akira.
+
 Tests
 -----