Issue #13781: Fix GzipFile to work with os.fdopen()'d file objects.
diff --git a/Misc/NEWS b/Misc/NEWS
index bceed46..b3c5b88 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -100,6 +100,9 @@
 Library
 -------
 
+- Issue #13781: Fix GzipFile bug that caused an exception to be raised when
+  opening for writing using a fileobj returned by os.fdopen().
+
 - Issue #13803: Under Solaris, distutils doesn't include bitness
   in the directory name.